Summary
It has previously been postulated that when plants are stressed by certain changes in patterns of weather they become a better source of food for invertebrate herbivores because this stress causes an increase in the amount of nitrogen available in their tissues for young herbivores feeding on them. And this may cause outbreaks of such phytophagous invertebrates.
Evidence is now presented that a similar physiological mechanism appears to operate when a wide variety of apparently unrelated environmental factors impinge on plants or parts of plants in such a way as to perturb their metabolism. A broken branch, lightning strike, fire, nutrient deficiencies or an otherwise adverse site; all may have this effect. With the advent of modern man the available agencies increase and diversify to include pesticides, irradiation and air pollutants.
One common metabolic response by plants to all such agents impinging on them seems to be equivalent to that found in senescing plant tissues — the breakdown and mobilization of nitrogen in soluble form away from the senescing/stressed tissues. Young herbivores which chance to feed on such stressed/senescing tissues have a greater and more readily available supply of nitrogen in their food than they would have had if feeding on unstressed plants. As a result many more of them survive, and there is an increase in abundance of their kind. Such increases may be quite localised and short-lived or more widespread and persistent, depending on the extent and duration of the stress experienced by the plants. And in the face of this improved nutrition and survival of the very young, predators and parasites seem to have only a minor influence on subsequent changes in abundance of their herbivorous prey.
Another effect of increased mobilization of nitrogen in stressed plants is an increase in the quantity of the seed that they set. This has led to the conclusion that increased abundance of some species of birds at such times is due to a greater supply of seeds as winter food for recent fledglings. But it may be that the increased abundance is due to the synchronous increase in phytophagous insects providing a richer source of protein food for laying hens and growing nestlings.
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References
Adams JB, Drew ME (1965) Grain aphids in New Brunswick III. Aphid populations in herbicide-treated oat fields. Can J Zool 43:789–794
Adzhemyan LA (1980) Effects of the insecticides Phosalone and Gardona on the content of sugars, organic acids, and amino acids in apple leaves. Sov Plt Physiol 97:119–122
Agrios GN (1966) Effect of extracts from healthy and virus-infected apple and pear tissues on the growth of certain pathogenic fungi. Phytopath 56:176–179
Ajayi O, Dewar AM (1982) The effect of barley yellow dwarf virus on honeydew production by the cereal aphids, Sitobion avenae and Metapolophium dirhodum. Ann appl Biol 100:203–212
Alden J, Herman RK (1971) Aspects of the cold-hardiness mechanism in plants. Bot Rev 37:37–142
Archer TL, Onken AB, Matheson RL, Bynum ED (1982) Nitrogen fertilizer influence on greenbug (Homoptera: Aphididae) dynamics and damage to sorghum. J econ Ent 75:695–713
Asakawa S, Keiji F, Akinori N, Toshitaka Y (1966) Effect of girdling on the coning of larch seed trees as affected by stand density. J Jap Forest Soc 48:245–249
Atkin RK, Srivastava BIS (1970) Studies on protein synthesis by senescing and kinetin-treated barley leaves. Physiologia Plantarum 23:304–315
Bagi G, Farkas GL (1968) A new aspect of the anti-stress effect of kinetin. Experientia 24:397–398
Bannister P (1971) The water relations of healthy plants from open and shaded habitats. J Ecol 59:51–64
Barnes RL, Bengtson GW (1968) Effects of fertilisation, irrigation and cover cropping on flowering and on nitrogen and soluble sugar compositions of Slash Pine. For Sci 14:172–180
Bartlett BR (1968) Outbreaks of two-spotted spider-mites and cotton aphids following pesticide treatment. I. Pest stimulation vs natural enemy destruction as the cause of outbreaks. J econ Ent 61:297–303
Batiste WC, Berlowitz A (1973) Codling Moth and Pear Psylla: Evaluation of insecticides for control on pears in California. J econ Ent 66:1139–1142
Beevers L (1976) Senescence. In: Bonner J
Verner JE (eds) Plant Biochemistry, Academic Press, New York, pp 771–794
Besford RT (1975) Effect of potassium nutrition on leaf protein concentrations and growth of young tomato plants. Plant and Soil 42:442–451
Beuchat LR, Smith DW, Young CT (1974) Effect of foliar fungicides on aflatoxin, oil and protein content and maturing rate of peanut kernels. J Sci Fd Agric 25:477–482
Bevan D (1969) Philosophy of forest insect control in Britain. J Sci Fd Agric 20:505–506
Bischoff M (1967) Investigation on feeding damage by Brachydores incanus L. on fertilised test plots. (In German) Forst-u-Holzw 22:4–8
Bjorkman O (1968) Carboxydismutase activity in shade-adapted and sun-adapted species of higher plants. Physiol Plant 21:1–10
Blagonravova LN (1973) The changes in nitrogen content in leaves of apple sprayed with insecticides [In Russian]. Byull Gosud Nikits Biotanich 35:56–59
Blais JR (1952) The relationship of the Spruce Budworm (Chroistoneura fumiferana, Clem) to the flowering condition of Balsam Fir (Abies balsamea (L.) Mill.). Canad J Zool 30:1–29
Brower JH (1974) Developmental success of two species of Ips (Coleoptera: Scolytidae) in a chronically irradiated forest community. Canad Ent 106:233–238
Brown GN, Bixby JA (1975) Soluble and insoluble protein patterns during induction of freezing tolerance in Black Locust seedlings. Physiol Plant 34:187–191
Bryant DM (1978) Environmental influences on growth and survival of nestling house martins Delichon rubica. Ibis 120:271–283
Carne PB (1965) Distribution of the eucalypt-defoliating sawfly Perga affinis affinis (Hymenoptera). Aust J Zool 13:592–612
Carpenter FL, Castronova JL (1980) Maternal diet selectivity in Calypte anna. Am Midl Nat 103:175–179
Carrow JR, Betts RE (1973) Effects of different foliar-applied nitrogen fertilisers on balsam woolly aphid. Can J For Res 3:122–139
Carrow JP, Graham K (1968) Nitrogen fertilisation of the host tree and population growth of the balsam woolly aphid Adelges piceae (Homoptera: Adelgidae). Canad Ent 100:478–485
Chaboussou F (1971) Physiological conditioning of vine and multiplication of leaf hoppers. (In French.) Revue de Zoologie Agricole et de Pathologie Vegetale 70:1–66
Charles PJ, Vellemant C (1977) Modifications of the levels of the populations of insects in young plantations of Scots pine in the forest of Roumare (Seine-Maritime) subject to atmospheric pollution. (In French.) Comptes Rendus des Seances de l'Academie d'agriculture de France 63:502–510
Chelliah S, Heindrichs EA (1980) Factors affecting insecticide-induced resurgence of the Brown Planthopper Nilaparvata lugens on rice. Env Ent 9:773–777
Chelliah S, Fabellar LT, Heindrichs EA (1980) Effects of sublethal doses of three insecticides on the reproductive rate of the Brown Planthopper, Nilaparvata lugens on rice. Env Ent 9:778–780
Cherry JP, Beuchat LR, Koehler PE (1978) Soluble proteins and enzymes as indicators of change in peanuts infected with Aspergillus flavus. J Agr Food Chem 26:242–245
Chu TM, Aspinall D, Paleg LG (1974) Stress metabolism. VI. Temperature stress and the accumulation of proline in barley and radish. Aust J Plant Physiol 1:87–97
Chu TM, Jusaitis M, Aspinall D, Paleg LG (1978) Accumulation of proline at low temperatures. Physiol Plant 43:254–260
Clark LR, Dallwitz MJ (1974) On the relative abundance of some Australian psyllidae that co-exist on Eucalyptus blakelyi. Aust J Zool 22:387–415
Cobb FW, Stark RW (1970) Decline and mortality of smog injured ponderosa pine. J For 68:147–149
Cooper P, Selman JW (1974) An analysis of the effects of Tobacco Mosaic Virus on growth and the changes in the free amino compounds in young tomato plants. Ann Bot 38:625–638
Court RD, Williams WT, Hegarty MP (1972) The effect of mineral nutrient deficiency on the content of free amino acids in Setaria sphacelata. Aust J Biol Sci 25:77–87
Coutts MP, Dolezal JE (1966) Some effects of bark cincturing on the physiology of Pinus radiata and on Sirex attack. Aust For Res 2:17–28
Cowling DW, Bristow AW (1979) Effects of SO2 on sulphur and nitrogen fractions and on free amino acids in perennial ryegrass. J Sci Food Agric 30:354–360
Crowe TM (1978) Limitation of population in the helmeted guineafowl. S Afr J Wildl Res 8:117–126
Cumber RA, Todd DH (1959) Serious outbreak of the aphid Rhopalosiphon padi (L.) in North Island wheat, oat and barley crops during 1958. NZ J Agr Res 2:773–784
Cummins JN, Forsline PL, MacKenzie JD (1981) Wooly Apple Aphid colonization on Malus cultivares. J Amer Soc Hort Sci 106:26–29
Danthanarayana W, Kathiravetpillai A (1969) Studies on the ecology and cause of outbreaks of Ectropis bhurmitra Wkr. (Geometridae), the twig caterpillar of tea in Ceylon. J appl Ecol 6:311–322
De Datta SK, Obcemea WN, Jana RK (1972) Protein content of rice grain as affected by nitrogen fertiliser and some triazines and substituted ureas. Agron J 64:785–788
Dempster JP (1968) The control of Pieris rapae with DDT. III. Some changes in the crop fauna. J appl Ecol 5:463–475
Dittrich V, Streibert P, Bathe PA (1974) An old case reopened: mite stimulation by insecticide residues. Environ Ent 3:534–540
Dixon AFG (1966) The effect of population density and nutritive status of the host on the summer reproductive activity of the Sycamore Aphid, Drepanosiphum platanoides (Schr.). J anim Ecol 35:105–112
Dixon GR (1971) Effect of root disturbance on the amino acid concentrations of young tomato leaflets. Plant and Soil 34:531–534
Don-Pedro KN (1980) A population explosion of Aphis crassivora Koch following DDT application in a cowpea plot (Vigna unguiculata) cultiva (prima) in Nigeria. J Nat Hist 14:617–619
Dove LD (1968) Nitrogen distribution in tomato plants during drought (Lycopersicum esculentum “Marglobe”). Phyton Rev Int Bot Exp 25:49–52
Draper SR (1975) Amino acid changes associated with the development of cold hardiness in perennial ryegrass. J Sci Fd Agric 26:1171–1176
Dzeciol U, Bielinska-Czarnecka M (1967) Seasonal changes in soluble nitrogen and some free amino acids content in the buds and spurs of biennially bearing apple trees. Acta Agrobot 20:87–94
Ebell LF (1967) Cone production induced by drought in potted Douglas Fir. Bi-monthly Res Notes 23:26–27
Ebell LF (1971) Girdling: its effect on carbohydrate status and on reproductive bud and cone development of Douglas Fir Can J Bot 49:453–466
Ebell LF, McMullan EE (1970) Nitrogenous substances associated with differential cone production responses of Douglas Fir to ammonium and nitrate fertilisation Can J Bot 48:2169–2177
Ebert E, Dumford SW (1976) Effects of triazine herbicides on the physiology of plants. Residue Rev 65:1–103
Edmunds GF Jr (1973) Ecology of Black Pineleaf scale (Homoptera: Diaspididae). Env Ent 2:765–777
Edmunds GF Jr, Alstad DN (1978) Coevolution in insect herbivores and conifers. Science 199:941–945
Eichmeier J, Guyer G (1960) An evaluation of the rate of reproduction of the two-spotted spider mite reared on gibberellin treated bean leaves. J econ Ent 53:661–664
Elbadry EA, Khalil FA (1973) Population dynamics of spider mites and predators as influenced by pesticides for the control of late-season cotton pests. Z angew Ent 72:319–323
Eldridge RH, Turner J, Lambert MC (1981) Dothistroma needle blight in a New South Wales Pinus radiata plantation in relation to soil types. Aust For 44:42–45
Elmore CD, McMichael BL, Cathey GW (1978) Effects of a phosphate defoliant on cotton leaves: water relations and free amino acids. Crop Sci 18:645–648
El-Zeftawi BM, Weste HL (1970) Time and level of pruning with cincturing or PCPA in relation to yield and quality of zante currant. Aust J expt Agric and Animal Husbandry 10:484–487
Emden HF van (1964) Effect of (2-Chloroethyl) trimethylammonium chloride on the rate of increase of the cabbage aphid (Brevicoryne brassicae (L.)). Nature 201:946–948
Emden HF van, Eastop VF, Hughes RD, Way MJ (1969) The ecology of Myzus persicae. Ann Rev Ent 14:197–270
Emden HF van, Way MJ (1972) Host plants in the population dynamics of insects. Symp Roy Ent Soc Lond 6:181–199
Entwistle PF, Johnson CG, Dunn E (1959) New pests of cocoa (Theobroma cacao L.) in Ghana following applications of insecticides. Nature 184:2040
Erickson SS, Dashek WV (1982) Accumulation of foliar soluble proline in sulphur dioxide-stressed Glycine max c.v. ‘Essex’ and Hordeum vulgare c.v.s. ‘Proctor’ and ‘Excelsior’ seedlings. Env Pollut (A) 28:89–108
Eriksson K (1970) Ecology of the irruption and wintering of Fennoscandian Redpolls (Carduelis flammea). Ann Zool Fennici 7:273–282
Eveleens KG, Bosch R van den, Ehler LE (1973) Secondary outbreak induction of beet armyworm by experimental insecticide applications in cotton in Calfiornia. Env Ent 2:497–503
Faeth SH, Mopper S, Simberloff D (1981) Abundances and diversity of leaf-mining insects on three oak host species: effects of host-plant phenology and nitrogen content of leaves. Oikos 37:238–251
Farkas GL, Dezsi L, Horvath M, Kisban K, Udvardy J (1964) Common patterns of enzymatic changes in detached leaves and tissues attacked by parasites. Phytopathol Z 49:343–354
Farkas GL, Stahmann MA (1966) On the nature of changes in peroxidase isoenzymes in bean leaves infected by Southern Bean Mosaic Virus. Phytopath 56:669–677
Fedtke C (1972) Influence of photosynthesis-inhibiting herbicides on the regulation of crop plant metabolism. Pesticide Biochem Physiol 2:312–323
Fedtke C (1973) Effects of the herbicide Methabenzthiazuron on the physiology of wheat plants. Pestic Sci 4:653–664
Fedtke C (1974) Changed physiology in wheat plants treated with the herbicide Methabenzthiazuron. Naturwissenschaften 61:272–273
Fennah RG (1954) Nitrogen partition in the normal cacao leaf. A report on Cacao Research:45–52
Fennah RG (1965) The influence of environmental stress on the cacao tree in predetermining the feeding sites of cacao thrips, Selenothrips rubrocinctus (Giard), on leaves and pods. Bull Ent Res 56:333–349
Fleschner CA (1952) Host plant resistance as a factor influencing population density of citrus red mites on orchard trees. J econ Ent 45:687–695
Flueckiger W, Oertli JJ, Baltensweiler W (1978) Observations of an aphid infestation on Hawthorn in the vicinity of a motorway. Naturwissenschaften 65:654–655
Flueckiger W, Oertli JJ, Flueckiger-Keller H, Braun S (1979) Premature senescence in plants along a motorway. Environ Pollut 20:171–176
Forcella F (1982) Why twig-girdling beetles girdle twigs. Naturwissenschaften 69:398–399
Fuhrer E (1967) Investigations on the causes of susceptibility to attack by Eucosma (Epiblema) tedella (Lep. Tortricidae) in European spruce (Picea abies). (In German) Z angew Ent 59:292–318
Ghildiyal MC, Pandey M, Sirohi GS (1977) Proline accumulation under zinc deficiency in mustard. Current Science 46:792–793
Gildow FE (1980) Increased production of alatae by aphids reared on oats infested with Barley Yellow Dwarf Virus. Ann Ent Soc Amer 73:343–347
Godzic S, Linskens HF (1974) Concentration changes of free amino acids in primary bean leaves after continuous and interrupted SO2 fumigation and recovery. Environ Pollut 7:25–38
Goldman SE, Cleveland GD, Parker JA (1978) Beetle response to Slash Pine treated with paraquat to induce lightwood formation. Env Ent 7:372–374
Goring H, Thien Bui Huy (1979) Influence of nutrient deficiency on proline accumulation in the cytoplasm of Zea mays L. seedlings. Biochem Physiol 174:9–16
Greenbank DO (1970) Climate and the ecology of the balsam woolly aphid. Canad Ent 102:546–578
Grill D, Esterbauer H, Scharner M, Felgitsch C (1980) Effect of sulphur-dioxide on protein-SH in needles of Picea abies. Europ J For Path 10:263–267
Haas W (1969) Amino acid composition of proteins in sun and shade leaves of the copper beech (Fagus sylvatica L. cv. Atropunicea) (In German) Planta 87:95–101
Hagen CL, Gunckel JE (1958) Free amino acid levels in Nicotiana glauca, N. langsdorffii and their interspecific hybrid following gamma irradiation. Plant Physiol 33:439–443
Hamstead EO, Gould E (1957) Relationship of mite populations to seasonal leaf nitrogen levels in apple orchards. J econ Ent 50:109–110
Hanks RW, Feldman AW (1966) Quantitative changes in free and protein amino acids in leaves of healthy Radopholus somilis — infected, and “recovered” grapefuit seedlings. Phytopath 56:261–264
Harris KM (1969) Population increases of Steneotarsonemus pallidus (Banks) following spray applications of dimethoate. Plant Pathology 18:113–115
Harris KM (1973) Host resistance to the pear psylla in a Pyrus communis X P. ussuriensis hybrid. Env Ent 2:883–887
Hart WG, Ingle S (1971) Increases in fecundity of brown soft scale exposed to methyl parathion. J econ Ent 1:204–208
Helms JA, Cobb Jr FW, Whitney HS (1971) Effect of infection by Verticicladiella wagenerii on the physiology of Pinus ponderosa. Phytopath 61:920–925
Henckel PA (1965) Physiology of plants under drought. Ann Rev Plant Physiol 15:363–386
Hill J (1980) The remobilization of nutrients from leaves. J Plant Nutrit 2:407–444
Hinckley AD (1963) Lepidopterous leafminers on Sweet Potato in Fiji. Bull Ent Res 53:665–670
Hinckley AD (1971) Infestation of irradiated white oaks by the solitary oak leafminer, Cameraria hamadryadalla (Lepidoptera: Gracilariidae). Ann Ent Soc Amer 64:1094–1098
Hinckley AD (1973) Concentrations of Oak Aphids, Myzocallis spp., on irradiated White Oaks. Env Ent 2:697–700
Hintz SD, Schultz JT (1969) The effect of selected herbicides on cereal aphids under greenhouse conditions. Proc N cent Brch Am Ass econ Ent 24:114–117
Hirano C (1964) Studies on the nutritional relationships between larvae of Chilo suppressalis Walker and the Rice Plant, with special reference to the role of nitrogen in nutrition of larvae. Bull Nat Inst Agr Sci (Japan). Ser C 17:103–180
Hodges CF, Robinson PW (1977) Sugar and amino acid content of Poa pratensis infected with Ustilago striiformis and Urocystis agropyri. Physiol Plant 41:25–28
Hodgson CJ (1981) Effects of infection with the cabbage black ringspot strain of turnip mosaic virus on turnip as a host to Myzus persicae and Brevicoryne brassicae. Ann appl Biol 98:1–14
Hodkinson ID, Jensen TS, MacLean SF (1979) The distribution, abundance and host plant relationships of Salix-feeding psyllids (Homoptera: Psylloidea) in arctic Alaska. Ecol Ent 4:119–132
Högstedt G (1981) Effect of additional food on reproductive success in the magpie (Pica pica.). J Anim Ecol 50:219–229
Holmsgaard E, Olsen HC (1960) The effect of weather on the production of Beech Mast. (In Danish) Forstl Forsogso Danm 26:345–370
Holmsgaard E, Olsen HC (1966) Experimental induction of flowering in Beech; with an epilogue by C Syrach Larsen. Forstlige Forsogsvaesen i Denmark, 30:1–17
Honeyborne CHB (1969) Performance of Aphis fabae and Brevicoryne brassicae on plants treated with growth regulators. J Sci Food Agric 20:388–390
Huffaker CB, Vrie M van der, McMurty JA (1969) The ecology of tetranychid mites and their natural control. Ann Rev Ent 14:125–174
Hughes PR, Potter JE, Weinstein LH (1982) Effects of air pollution on plant insect interactions: Increase susceptibility of greenhouse-grown soybeans to the mexican bena beetle after exposure to SO2. Env Ent 11:173–176
Iqbal J, Kutăcek M, Jirăcek V (1974) Effects of acute gamma irradiation on the concentration of amino acids and protein nitrogen in Zea mays. Radiation Botany 14:165–172
Isaak A, Sorensen EL, Painter RH (1965) Stability of resistance to pear aphid and spotted alfalfa aphid in several alfalfa clones under various temperature regimes. J econ Ent 58:140–143
Jayaraj S, Seshadri AR (1967) Preference of the leaf hopper Empoasca kerri Pruthi (Homoptera: Jassidae) to pigeon pea (Cajanus cajan (L.) Millsp.) plants infected with sterility mosaic virus. Current Science 36:353–355
Jensen SG (1969) Composition and metabolism of barley leaves infected with Barley Yellow Dwarf Virus. Phytopath 59:1694–1699
Journet ARP (1980) Intraspecific variations in food plant favourability to phytophagous insects: psyllids on Eucalyptus blakelyi M. Ecol Ent 5:249–261
Kaufman MR (1972) Water deficits and reproductive growth. In: Water deficits and plant growth, Vol. III. Plant Responses and Control of Water Balance. Kozlowski TT (ed) pp 91–124
Kay M (1982) Towards predicting outbreaks of Pseudocoremia suavis (Lepidoptera: Geometridae). NZ Ent 7:243–247
Kennedy JS (1951) Benefits to aphids from feeding on galled and virus-infected leaves. Nature 168:825–826
Kessler B, Swirski E, Tahori AS (1959) Effects of purines upon nucleic acids and nitrogen metabolism of leaves and their sensitivity to aphids. Ktavim 9:265–274
Kessler B, Spiegel S, Zolotov Z (1967) Control of leaf senscence by growth retardants. Nature 213:311–312
Kimmins JP (1971) Variations in the foliar amino acid compositions of flowering and non-flowering balsam fir (Abies balsamea (L.) Mill.) and white spruce (Picea glauca (Moench) Voss) in relation to outbreaks of the spruce budworm (Choristoneura fumiferana) (Clem). Can J Zool 49:1005–1011
Kinn DN, Doutt RL (1972) Initial survey of arthropods found in North coast vineyards of California. Env Ent 1:508–513
Klepper B (1968) Diurnal pattern of water potential in woody plants. Plant Physiol 43:1931–1934
Knypl JS (1970) Arrest of yellowing in senescing leaf discs of maize by growth retardants, Coumarin and inhibitors of RNA and protein synthesis. Biologia Plantarum (Praha) 12:199–207
Kolderup F (1975) Effects of temperature, photoperiod and light quality on protein production in wheat grains. J Sci Fd Agric 26:583–592
Kozlova NA, Ermolaeva EY (1963) Use of biologically active agents in plant protections. (In Russian.) Tr Leningr Obshchest Estestvorspyt 74:49–52
Kozlowski TT (1965) Water metabolism in plants. Harper & Row, NY and John Weatherhill, Tokyo
Kozlowski TT (1979) Tree growth and environmental stress. Univ of Washington Press. Seattle & London
Kuzin AM, Fomenko BS, Medvedev AI (1968) Effect of ionising radiation on tyrosine metabolism and phenylalamine in irradiated plants. (In Russian) Radiobiologiya 8:736–741
Labanauskas CK, Handy MF (1970) The effect of iron and manganese deficiencies on accumulation of non-protein and protein amino acids in macadamia leaves. J Amer Soc Hort Sci 95:218–223
Labanauskas CK, Luxmore RJ, Stolzy LH (1974) Soil temperature and soil aeration effects on protein and free amino acid concentrations in wheat grain. Plant & Soil 41:351–363
Lahiri AN, Singh S (1969) Effect of hyperthermia on the nitrogen metabolism of Pennisetum typhoides. Proc Nat Inst Sci India Pt B 35:131–138
Lerer M, Bar-Akiva A (1976) Nitrogen constituents in manganese-deficient lemon leaves. Physiol Plant 38:13–18
Levitt J (1972) Responses of plants to environmental stress. Academic Press: New York and London
Levitt J (1980a) Responses of plants to environmental stress Vol. 1 2nd Edition: Chilling, freezing and high temperature stresses. Academic Press: New York
Levitt J (1980b) Responses of plant to environmental stress Vol. II. 2nd Editon: Water, radiation, salt, and other stresses. Academic Press, New York
Lewis AC (1979) Feeding preference for diseased and wilted sunflower in the grasshopper Melanoplus differentialis. Ent exp & appl 26:202–207
Lewis AC (1982) Conditions of feeding preference for wilted sunflower in the grasshopper Melanoplus differentialis. Proc 5th Int Symp Insect-Plant Relationships, Wageningen. 49–56
Linde RJ van der, Voute AD (1967) The food plant as a factor in the regulation (of insect populations). In: Annual Report of the Institute for Biological Field Research. (ITBON) No. 82
Lobzhanidze TD (1977) The effect of some pesticides on carbohydrate and nitrogen metabolism in apple tree leaves and its possible significance in the intensive reproduction of Tetranychus mites. (In Russian) Bull Acad Sci Georgian SSR 88:453–456
Lodh SB, Ravel P, Singh S (1971) Studies on nitrogen metabolism in tomoto (Lycopersicon esculentum Mill) infected with tomato leaf curl virus. Indian J exp Biol 9:281–283
Loyttyniemi K, Tulisalo U (1972) Amino acid composition of the needles of four Norway spruce provenances, and their effect on the occurrence of Oligonychus ununguis (Jacobi). (Acarina, Tetranychidae) Ann Ent Fen 38:122–126
Luck RF, Dahlsten DL (1975) Natural decline of a pine needle scale (Chionaspis pinifoliae (Fitch)), outbreak at south Lake Tahoe, California, following cessation of adult mosquito control with malathion. Ecology 56:893–904
Macias W, Mink GI (1969) Preference of green peach aphids for virus-infected sugarbeet leaves. J econ Ent 62:28–29
Mack AR (1973) Influence of soil temperature and moisture conditions on growth protein production of Manitou and two semidwarf Mexican spring wheats. Can J Plant Sic 53:721–735
Mackay PA, Wellington WG (1977) Notes on the life history and habits of the red-backed sawfly, Eriocampa ovata (Hymenoptera: Tenthredinidae). Can Ent 109:53–58
Macleod LB, Suzuki M (1967) Effect of potassium on the content of amino acids in alfalfa and orchard grass grown with NO3 - and NH4 + nitrogen in nutrient solution culture. Crop Science 7:599–605
Madden JL (1971) Some treatments which render Monterey pine (Pinus radiata) attractive to the wood wasp Sirex noctilio F Bull ent Res 60:467–472
Maelzer DA (1977) The biology and main cause of changes in numbers of the Rose Aphid, Macrosiphum rosae (L.), on cultivated roses in South Australia. Aust J Zool 25:269–284
Maeng J, Khudairi AK (1973) Studies on the flowering mechanism in Lemna. I. Amino acid changes during flower induction. Physiologia Plantarum 28:264–270
Mahall BE, Schlesinger WH (1982) Effects of irradiance on growth, photosynthesis, and water use efficiency of seedlings of the chaparral shrub, Ceanothus megacarpus. Oecologia (Berl.) 54:291–299
Malhotra SS, Sarkar SK (1979) Effects of sulphur dioxide on sugar and free amino acid content of pine seedlings. Physiol Plant 47:223–228
Markkula M, Titanen K (1969) Effects of fertilisers on the reproduction of Tetranychus telarius (L.), Myzus persicae (Sulz) and Acyrthosiphon pissum Harris. Ann Agr Fenn 8:9–14
Martin C, Thimann KV (1972) The role of protein synthesis in the senescence of leaves. I. The formation of protease. Plant Physiol 49:64–71
Mathews JD (1963) Factors affecting the production of seed by forest trees. Forestry Abstracts 24:i-xiii
Mathews ID (1970) Flowering and seed production in conifers. In: “Physiology of Tree Crops”, Luckwill and Cutting (eds). Proc 2nd Long Ashton Symp 1969:45–53
Maxwell RC, Harwood (1960) Increased reproduction of pea aphids on broad beans treated with 2,4-D. Ann Ent Soc Amer 53:199–205
McClure MS (1977) Resurgence of the scale Fiorinia externa (Homoptera: Diaspididae), on hemlock following insecticide application. Env Ent 6:480–484
McCoy CW (1977) Resurgence of citrus rust mite populations following applications of methidathion. J Econ Ent 70:748–752
McNeal FH, Hodgson JM, Berg MA (1969) Effect of dilute sprays of simazine on spring wheat. Can J Plant Sci 49:155–158
Meon S, Fisher JM, Wallace HR (1978) Change in free proline following infection of plants with either Meloidogyne javanica or Agrobacterium tumefaciens. Physiol Plant Pathol 12:251–256
Merino LG, Vazquez V (1966) Influence of fertilisers on the damage caused by Epitrix sp. larvae in potato tubers in Ecuador. (In Spanish) Turrialba 16:84–85
Metcalfe JR (1970) Studies on the effect of the nutrient status of sugar cane on the fecundity of Saccharosydne saccharivora (Westw) (Hom, Delphacidae). Bull Ent Res 60:309–325
Misra R, Singh JS, Singh KP (1968) Dry matter production in sun and shade leaves and a simple method for the measurement of primary productivity. Curr Sci 37:306–307
Mitchell PL, Newsom LD (1984) Histological and behavioural studies of threecornered alfalfa hopper feeding on soybean. Ann Ent Soc Amer (in press)
Mitchell RG, Paul HG (1974) Field fertilisation of Douglas Fir and its effect on Adelges cooleyi populations. Env Ent 3:501–504
Mooney HA, Gulmon SL (1982) Constraints on leaf structure and function in reference to herbivores. Bioscience 32:198–206
Moore KG, Leach R (1968) The effect of 6-benzylaminopurine (benzyladenine) on senescence and chocolate spot (Botrytis fabae) of winter beans (Vicia fabae). Ann appl Biol 61:65–76
Montgomerie RD, Redsell CA (1980) A nesting hummingbird feeding solely on arthropods. Condor 82:463–464
Moran VC, Gunn BH, Walter GH (1982) Wind dispersal and settling of first-instar crawlers of the cochineal insect Dactylopius austrinus (Homoptera: Coccoidea: Dactylopiidae). Ecol Ent 7:409–419
Mujeeb KA, Greig JK (1978) Effect of gamma irradiation and periodic sampling on primary leaf amino acid composition of Phaseolus vulgaris L.C.V. Blue Lake. Pakistan J Bot 10:107–112
Mukherjee AK, Soans LC, Chessin M (1967) Effects of kinetin and Actinomycin D on the susceptibility of Nicotiana glutinosa L. to infection by tobacco mosaic virus. Nature 216:1344–1345
Myrberget S (1981) Diet of willow grouse Lagopus lagopus chicks on a Norwegian coastal island. Fauna Norv Ser C 4:58–63
Myers JH (1979) The effects of food quantity and quality on emergence time in the cinnabar moth. Can J Zoo 57:1150–1156
Nanne HW, Radcliffe EB (1971) Green peach aphid populations on potatoes enhanced by fungicides. J econ Ent 64:1569–1570
Nef L (1967) Comparison of populations of Rhyaciona buoliana in relation to mineral fertilising. (In French) Proc 14th Congr Int Union For Res Organ, Munich 1967, Pt V, Sect 24, pp 650–658
Nelson NN, Shields LM, Platt RB (1969) Incidence of pine needle gall fly infestation in pine species two years post irradiation. Bot Gaz 130:226–230
Neubauer R, Avizohar-Hershenson Z (1973) Effect of the herbicide, Trifluralin, on Rhizoctonia disease in cotton. Phytopath 63:651–652
Newbery D McC (1980) Interactions between the coccid, Icerya seychellarum (Westw) and its host tree species on Aldabra atoll. I. Euphorbia pyrifolia Lam. Oecologia (Berlin) 46:171–179
Newton I (1970) Irruptions of Crossbills in Europe. Symp Brit Ecol Soc 10:337–357
Nielsen DG, Johnson NE (1972) Control of the pine needle scale in central New York. J econ Ent 65:1161–1164
Niemela P (1980) Dependence of Oporinia autumnata (Lep. Geometridae) outbreaks on summer temperature. Rep Kevo Subarctic Res Stat 16:27–30
Niemela P, J Tuomi, Haukioja E (1980) Age-specific resistance in trees: Defoliation of tamaracks (Larix laricina) by larch budmoth (Zeiraphera improbana) (Lep., Tortricidae). Rep Kevo Subarctic Res Stat 16:49–57
Nilsson G (1977) Effect of glyphosate on the amino acid content in spring wheat plants. Swed J Agric Res 7:153–158
Nisbet ICT (1978) Dependence of fledgling success on egg-size, parental performance and egg-composition among common and Roseate terns Sterna hirundo and S. dougallii. Ibis 120:207–215
Oatman ER, Legner EF, Brooks RF (1966) An ecological study of arthropod populations in northeastern Wisconsin: Species affecting the fruit. J econ Ent 59:165–168
Oatman ER (1973) An ecological study of arthropod populations on apple in northwestern Wisconsin: Population dynamics of mite species on the foliage. Ann ent Soc Amer 66:122–131
Oka IN, Pimental D (1974) Corn susceptibility to corn leaf aphids and common corn smut after herbicide treatment. Env Ent 3:911–915
Oka IN, Pimentel D (1976) Herbicide (2,4-D) increases insect and pathogen pests on corn. Science 193:239–240
Oka IN, Pimental D (1979) Ecological effects of 2,4-D herbicide: increased corn pest problems. Contr Centr Res Inst Agric Bogor 49:1–17
Osisanya EO (1970) Effect of shade on the rate of infestation of Triplochiton scleroxylon by Diclidophlebia species. Ent exp & appl 13:125–132
Owen DF, Weigert RG (1982) Beating the walnut tree — more on grass grazer mutualism. Oikos 39:115–116
Palfi G, Juhasz J (1970) Increase of the free proline level in water deficient leaves as a reaction to saline or cold root media. Acta Agron Acad Sci Hung 10:79–88
Pandey RM (1968) Changes in nitrogenous fractions of certain crop plants as affected by phosphorous deficiency. Flora, Abt A. Bd 159:299–306
Pandey RM (1975) Changes in nitrogenous fractions as affected by phosphorus and potassium deficiencies in various parts of Linum usitatissimum L. Ind. J Plt Physiol 18:71–79
Paquin R, Pierre JC St (1980) Hardening, frost resistance and free proline content of Phleum pratense. [In french]. Can J Plant Sci 60:525–532
Patel GM, Patel KC, Patel RD (1970) Free amino acids during germination of γ-irradiated groundnuts. J Agric Food Chem 18:1168–1171
Perring TM, Archer TL, Johnson JW, Phillips JM (1982) Evaluation of several grain sorghum characteristics for resistance to the banks grass mite. J econ Ent 75:257–260
Perrins CM (1965) Population fluctuations and clutch-size of the great tit, Parus major L. J anim Ecol 34:601–647
Perrins CM (1966) The effect of beech crops on great tit populations and movements. Brit Birds 59:419–432
Pierre M, Queiroz O (1981) Enzymatic and metabolic changes in bean (Phaseolus vulgaris cultivar Menil) leaves during continuous pollution by subnecrotic levels of sulfur dioxide. Env Pollut (A) 25:41–51
Pillai NG, Shanta P (1965) Free amino acids in coconut palms affected by root (wilt) disease. Current Science 34:636–637
Poe SL (1971) Influence of host plant physiology of populations of Tetranychus urticae (Acarina: Tetranychidae) infecting strawberry plants in peninsular Florida. Florida Entomologist 54:183–186
Poole AL (1948) The flowering of beech. NZ J For 5:1–7
Port GR, Thompson JR (1980) Outbreaks of insect herbivores on plants along motorways in the United Kingdom J appl Ecol 17:649–656
Pozsár BI, Hammady ME, Király Z (1967) Cytokinin effect of benzyladenine: Increase of nucleic acid and protein synthesis in bean leaves. Nature 214:273–274
Pringle KL (1975) The seasonal occurrence of phytophagous mites and their predators on apple trees in the Elgin area. Proc 1st Congr ent Soc Sth Afr:131–140
Przybylski Z (1979) The effects of automobile exhaust gases on the arthropods of cultivated plants, meadows and orchards. Environ Pollut 19:157–161
Pulliainen E (1978) Autumn and winter nutrition of the Capercaillie (Tetrao urogallus) in the northern Finnish taiga. Woodland Grouse Symp Scotland 1978:92–97
Purvis AC, Yelenosky G (1982) Sugar and proline accumulation in grapefruit flavedo and leaves during cold hardening of young trees. J Amer Soc Hort Sci 107:222–225
Rabe R, Kreeb KH (1979) Enzyme activities and chlorophyl and protein content in plants as indicators of air pollution. Environ Pollut 19:119–137
Reddy MN, Rao AS (1976) Changes in the composition of free and protein amino acids in groundnut leaves induced by infection with Puccinia arachidis Speg. Acta Phytopathologica 11:167–172
Reddy PR, Sridhar R (1975) Influence of bacterial streak disease development of changes in phenolics, soluble amino acids and carbohydrates of rice leaves. Biologia Plantarum (Praha) 17:363–367
Rendig VV, Oputa C, McComb EA (1976) Effects of sulfur deficiency on non-protein nitrogen, soluble sugars, and N/S ratios in young corn (Zea mays L.) plants. Plant & Soil 44:423–437
Ries SK, Schweizer CJ, Chmiel H (1968) The increase in protein content and yield of Simazine-treated crops in Michigan and Costa Rica. Bioscience 18:205–208
Robinson PW, Hodges CF (1977) Effect of nitrogen fertilisation on free amino acid and sugar content of Poa pratensis and on infection and disease severity by Drechslera sorokiniana. Phytopath 67:1239–1244
Rodriquez JG (1960) Nutrition of the host and reaction to pests. Publ Amer Assoc Adv Sci 61:149–167
Rodriguez JG, Chaplin CE, Stoltz LP, Lasheen AM (1970) Studies on resistance of strawberries to mites. I. Effects of plant nitrogen. J econ Ent 63:1855–1858
Root RB, Skelsey JJ (1969) Biotic factors involved in crucifer aphid outbreaks following insecticide application. J econ Ent 62:223–233
Rutherford PP, Bard DR (1971) Water uptake and invertase and hydrolase activities induced in chicory root disks by treatment with various plant growth regulators. Phytochemistry 10:1635–1638
Salama HS, Hamdy MK (1973) Studies on the population dynamics of Lepidosaphes pallida (Green) (Homopt, Coccoidea). II. Interaction of factors affecting insect distribution. Z ang Ent 73:197–202
Samborski DJ, Forsyth FR, Person C (1958) Metabolic changes in detached wheat leaves floated on benzimidazole and the effect of these changes on rust reaction. Canad J Bot 36:591–601
Sardi K (1981) Changes in the soluble protein content of soybean Glycine max L. and pea Pisum sativum L. under continuous SO2 and soot pollution. Env Pollut (A) 25:181–186
Sax K (1963) The stimulation of plant growth by ionising radiation. Rad Bot 3:179–186
Schaefers GA, Montgomery ME (1973) Influence of cytokinin (N6 Benzyladenine) on development and alary polymorphism in strawberry aphid Chaetosiphon fragaefolii. Ann Ent Soc Amer 66:1115–1119
Schaeverbeke-Sacre J (1977) Changes in nitrogen content in gamma irradiated Jerusalem artichoke tuber tissue. (In French) CR Seances Soc Biol Fil 171:1195–1201
Scriber JM (1979) Effects of leaf-water supplementation upon postingestive nutritional indices of forb-, shrub-, vine-, and tree-feeding lepidoptera. Ent exp & appl 25:240–252
Seitz EW, Hochter RM (1964) Free proline in normal and crown-gall tumor tissue of tomato and tobacco. Life Sci 3:1033–1037
Sharma ML (1970) Responses of phytophagous insects to treatments of nitrogen, potassium and phosphorus applied to plants (general review). Ann Soc Entomol Que 15:88–95
Shepherd RF (1959) Phytosociological and environmental characteristics of outbreak and non-outbreak areas of the two-year cycle spruce budworm, Choristoneura fumiferana. Ecology 40:608–620
Shih SC, Jung GA, Shelton DC (1967) Effects of temperature and photoperiod on metabolic changes to alfalfa in relation to cold hardiness. Crop Science 7:385–389
Shomer-Ilan A, Waisel Y (1975) Cold hardiness of plants. Correlation with changes in electrophoretic mobility, composition of amino acids and average hydrophobicity of fraction-1-protein. Physiol Plant 34:90–96
Singh BB (1970) Effects of gamma ray irradiation on protein and amino acid content of maize leaves. Current Science 39:163–164
Singh D, Smalley EB (1969a) Nitrogenous compounds in the xylem sap of American elms with Dutch elm disease. Can J Bot 47:1061–1065
Singh D, Smalley EB (1969b) Changes in amino acid and sugar constituents of the xylem sap of American elm following inoculation with Ceratocystis ulmi. Phytopath 59:891–896
Singh HC, Singh BR, Gangulee R (1978) Metabolism of cowpea leaves infected with southern bean mosaic. II. Effect on nitrogen metabolism. Acta Bot Indica 6:204–205
Singh K, Shukla US, Tripathi RC, Agnihotri VP (1974) Effect of host nutrition on the multiplication of Melanaphis indosacchari David. Indian J of Agric Sciences 44:14–17
Singh S, Verma VS, Goswami BK, Padma R (1974) Influence of Pigweed Mosaic Virus on free amino acids of Pigweed (Amaranthus viridis L.). Biologia Plant (Praha) 16:76–77
Smika DE, Greb BW (1973) Protein content of winter wheat grain as related to soil and climatic factors in the semi-arid Central Great Plains. Agron J 65:433–436
Smirnoff WA, Bernier B (1973) Increased mortality of the Swaine jackpine sawfly, and foliar nitrogen concentration after urea fertilisation. Can J For Res 3:112–121
Smirnova IM (1965) On the dependence of the numbers of the pea aphid (Aphis fabae Scop.) on the content of sugars and nitrogenous substances in sugar beet plants treated with DDT. (In Russian) Trudy vses Inst Zashch Rast 24:124–129
Smith BD (1968) The effects of plant growth retarding compounds on the behaviour of some pests and diseases of blackcurrant. Proc 4th Brit Insecticide and Fungicide Conf 1:364–368
Sosa O (1979) Hessian fly: Resistance of wheat as affected by temperature and duration of exposure. Env Ent 8:280–281
Stark RW (1965) Recent trends in forest entomology. Ann Rev Ent 10:303–324
Stark RW, Miller PR, Cobb FW, Wood DL, Parameter JR Jr (1968) Photochemical oxidant injury and bark beetle (Coleoptera: Scolytidae) infestations of ponderosa pine. I Incidence of bark beetle infestation in injured trees. Hilgardia 39:121–126
Steward FC, Crane F, Millar K, Zacharias RM, Parson R, Margolis D (1959) Nutritional and environmental effects on the nitrogen metabolism of plants. Symp Soc Expl Biol 13:148–176
Stewart GR, Larher F (1980) Accumulation of amino acids and related compounds in relation to environmental stress. 609–635. In: Biochemistry of Plants Vol 5. A comprehensive treatise Amino Acids and Derivatives. BJ Miflin Editor. Academic Press New York
Stobart AK, Shewry PR, Thomas DR (1972) The effect of kinetin on chlorophyll synthesis in ageing etiolated barley leaves exposed to light. Phytochem 11:571–577
Stoltz LP, Chaplin CE, Lasheen AM, Rodriquez JG (1970) Mineral nutrition of strawberry plants in relation to mite injury. J Amer Soc Hort Sci 95:601–603
Stoszek KJ, Mika PG, Moore JA, Osborne HL (1981) Relationships of Douglas-fir tussock moth defoliation to site and stand characteristics in northern Idaho. For Sci 27:431–442
Strydom DK, Honeyborne GE (1984) Increase in fruit set of starking delicious apples. Hort Science 16:51–52
Summerville WAT (1934) Queensland citrus scale insects and their control. Queensland Agric J 41:450–486, 568–591
Svestka M (1973) Influenceof weather on the population dynamics of the nun moth and the application of meteorological data to forecasting of its occurrence. (In Czech) Lesnictvi 19:1137–1150
Tahori AS, Halevy AH, Zeidler G (1965) Effect of some plant growth retardants on the oleander aphid Aphis nerii (Boyer). J Sci Fd Agric 16:568–569
Tarlakovskii SA (1965) The effect of insecticides used against the noxious pentatomid on the yield and quality of the grain of the wheat variety Benzostaya 1. (In Russian) Trudy vses Inst Zashch Rast 24:118–123
Taylor AO, Jepsen NM, Christeller JT (1972) Plants under climatic stress. III. Low temperature, high light effects on photosynthetic products. Plant Physiol 49:798–802
Tenow O (1975) Topographical dependence of an outbreak of Oporinia autumnata Bkh. (Lep. Geometridae) in a mountain birch forest in Northern Sweden. Zoon 3:85–110
Thankappan M, Chacko CI (1970) Changes in free amino acids and amides induced in cassava plants by cassava mosaic virus. Indian J Plant Physiol 13:99–105
Thomas JB (1965) Effect of insects on a girdled white pine plantation. Canad Dept of For Bi-monthly Prog Rpt 21:2
Thompson CA, Harvey TL (1980) Direct effect of the systemic insecticide, disulfoton, on yield of grain sorghum. Prot Ecol 2 (1):21–26
Thresh JM (1967) Increased susceptiblity of black currant bushes to the gall-mite vector (Phytoptus ribis Nal) following infection with reversion virus. Ann appl Biol 60:455–467
Thwaite WG (1976) Effect of reduced dosage of azinphos-methyl on control of codlin moth, Cydia pomonella (L.), and light-brown apple moth, Epiphyas postivittana (Walk), in an apple orchard. Z angew Ent 80:94–102
Tonecki J (1975) Changes in protein content and activity of proteases and acid phosphatases in needles of Norway spruce (Picea abies L. Karst) seedlings treated with 2,4,5-T. Acta Societatis Botanicorum Poloniae 44:41–49
Tu JC, Ford RE (1970) Free amino acids in soybeans infected with soybean mosaic virus, bean pod mottle virus, or both. Phytopathology 60:660–664
Tulisalo U (1971) Free and bound amino acids of there host plant species and various fertilising treatments affecting the fecundity of the two-spotted spider mite, Tetranychus urticae Koch (Acarina, Tetranychidae). Annales Entomologici Fennici 37:155–163
Udvardy J, Farkas GL (1966) Drifts in the enzyme levels in detached senescing barley leaves and their relation to enzyme changes in diseased tissues. Acta Phytopathologica Academiae Scientiarum Hungaricae 1:19–28
Varshney CK, Garg JK (1979) Plant responses to sulfur dioxide pollution. CRC Crit Rev Environ Control 9:27–50
Villemant C (1981) Influence of atmospheric pollution on populations of aphids on Scots Pine in Roumare Forest. [In french]. Environ Pollut A 24:245–262
Vince SW, Valiela I, Teal TM (1981) An experimental study of the structure of herbivorous insect communities in a salt marsh. Ecology 62:1662–1678
Vrie M van de, Delver P (1979) Nitrogen fertilization of fruit trees and its consequence for the development of Panonychus ulmi populations and the growth of fruit trees. Recent Advances in Acarology. 1: 23–30
Vrie M van de, McMurtry JA, Huffaker CB (1972) Ecology of tetranychid mites and their natural enemies: A review. III. Biology, ecology and pest status, and host-plant relations of tetranychids. Hilgardia 41:343–432
Walgenbach RP, Marten GC, Blake GR (1981) Release of soluble protein and nitrogen in alfalfa (Medicago sativa) 1. Influence of growth temperature and soil moisture. Crop Sci 21:843–849
Wallace MMH (1970) The biology of the Jarrah leaf miner, Perthida glyphopa Common (Lepidoptera: Incurvariidae). Aust J Zool 18:91–104
Wargo PM (1972) Defoliation induced chemical changes in sugar maple roots stimulate growth of Armillaria mellea. Phytopath 62:1278–1283
Waring RH, Cleary BD (1967) Plant moisture stress: Evaluation by pressure bomb. Science 155:1248–1254
Watt AD (1979) The effect of cereal growth stages on the reproductive activity of Sitobion avenae and Metopolophium dirhodum. Ann appl Biol 91:147–157
Webster GC (1959) Nitrogen metabolism in plants. Row Peterson & Co
West AS (1947) The California flathead borer (Melanophila californic, van Dyke) in ponderosa pine stands of north-eastern California. Canad J Res, D 25:97–118
White TCR (1969) An index to measure weather-induced stress of trees associated with outbreaks of psyllids in Australia. Ecology 50:905–909
White TCR (1970a) Some aspects of the life history, host selection, dispersal and ovipositions of adult Cardiaspina densitexta (Homoptera: Psyllidae). Aust J Zool 18:105–117
White TCR (1970b) The nymphal stage of Cardiaspina densitexta (Homoptera: Psyllidae) on leaves of Eucalyptus fasciculosa. Aust J Zool 18:273–293
White TCR (1971) Lerp insects (Homoptera, Psyllidae) on red gum (E. camaldulensis) in South Australia. Sth Aust Nat 46:20–23
White TCR (1973) The establishment, spread and host range of Paropsis charybdis Stal (Chrysomelidae) in New Zealand. Pacific Insects 15:59–66
White TCR (1974) A hypothesis to explain outbreaks of looper caterpillars, with special reference to populations of Selidosema suavis in a plantation of Pinus radiata in New Zeland. Oecologia (Berlin) 16:279–301
White TCR (1976) Weather, food and plagues of locusts. Oecologia (Berlin) 22:119–134
White TCR (1978) The importance of a relative shortage of food in animal ecology. Oecologia (Berlin) 33:71–86
Wilding MD, Stahmann MA, Smith D (1960) Free amino acids in alfalfa as related to cold hardiness. Plant physiol 35:726–732
Wood RKS (1967) Physiological Plant Pathology. (Botanical Monographs, Vol 6) Blackwell Scientific Pulications Oxford & Edinb
Woodwell GM (1967) Radiation and the patterns of nature. Science 156:461–470
Woodwell GM, Brower JH (1967) An aphid population explosion induced by chronic gamma irradiation of a forest. Ecology 48:680–683
Woodwell GM, Rebuck AL (1967) Effects of chronic gamma radiation on the structure and diversity of an oak pine fores. Ecol Monogr 37:53–69
Worthing CR (1969) Use of growth retardants on chrysanthemums: effect on pest populations. J Sci Fd and Agric 20:394–397
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White, T.C.R. The abundance of invertebrate herbivores in relation to the availability of nitrogen in stressed food plants. Oecologia 63, 90–105 (1984). https://doi.org/10.1007/BF00379790
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DOI: https://doi.org/10.1007/BF00379790