Screening of elite twenty chickpea cultivars of along with two desi checks PG 186 and L 550 was c... more Screening of elite twenty chickpea cultivars of along with two desi checks PG 186 and L 550 was carried out to evaluate for resistance to major pest Helicoverpa armigera. During the course of present investigation H. armigera was found to be major significance pest, which was mainly associated with leaves, flower and pod of chickpea. Present study revealed that, maximum mean egg and larval population were registered during 13th & 15th standard week respectively. The maximal and minimal number of mean egg population recorded of 12.86, 8.33 on ICC3137, D059 and 5.43, 3.60 on ICCV92944, respectively for 2012-13, 2013-14 seasons from selected five plants. The lowest larval population recorded of 23.33, 12.50 in ICCV07306, ICCV92944 and highest of 32.52, 22.39 in ICC3137, ICCV08107 in respective years. Per cent mean pod damage were ranged from 53.56 to 85.32 and 68.49 to 100 in respective years. The minimum grain yield of chickpea was recorded of 86.11, 158.33 kg/ha in ICCV07306, ICCV313...
The investigation was carried out to evaluate bioefficacy of biopesticides such as Jatropha oil, ... more The investigation was carried out to evaluate bioefficacy of biopesticides such as Jatropha oil, NSKE and NPV in various combinations along with control under chickpea-coriander intercropping ecosystem for three seasons against Helicoverpa armigera. The results revealed that the most effective treatment was T4 (chickpea; Jatropha treated) + coriander (NPV treated) followed by T9 (chickpea; Jatropha treated alone). The pooled mean of lowest damage for 3 years (2011, 2012, and 2013) was in chickpea (Jatropha treated) + coriander (NPV treated) treatments followed by chickpea (Jatropha treated) treatment alone. The mean grain yield of 1292 kg/ha was recorded for T4 treatment in chickpea (Jatropha at 5 mL/L) + coriander (NPV at 0.5 mL/L). The maximum coriander yield of 1008 kg/ha was obtained in T2 treatment, i.e., chickpea (NSKE treated) + coriander (untreated). The present results suggest that Jatropha curcas seed oil either alone or in combination with other biopesticides could be use...
Cowpea, Vigna unguiculata, is an important food crop in many tropical regions. The cowpea aphid, ... more Cowpea, Vigna unguiculata, is an important food crop in many tropical regions. The cowpea aphid, Aphis craccivora, Koch is a key pest of the crop. Olfactometer experiments were conducted in the laboratory to study the influence of host odour and population of conspecifics on apterae and alatae of cowpea aphid Aphis craccivora Koch. Among the four different host plants tested, more number of alatae responded to the allomonal cues emanating from cowpea leaves (1.6,) followed by that from glyricidia (1.4), dolichos (0.4) and groundnut (0.4). Apterous morphs also responded more to cowpea (1.6) followed by dolichos (0.6) groundnut (0.4) and glyricidia (0.2). The maximum retention time recorded inside the olfactometer for alate morph was on cowpea (360 seconds) followed by glyricidia (300seconds).Apterous morph recorded maximum retention time on glyricidia (300seconds) followed by cowpea (240 seconds). In response to host odour perception, it was observed that cowpea was the most preferre...
BIOINFOLET - A Quarterly Journal of Life Sciences, 2012
Thirty five cowpea genotypes were grouped into different categories based on the seed and seedlin... more Thirty five cowpea genotypes were grouped into different categories based on the seed and seedling morphological characters. Among all characters colour of seed coat, seed shape and seed size were found stable and uniform.
Field experiments were carried out to study the population dynamics of Lobster moth (Neostauropus... more Field experiments were carried out to study the population dynamics of Lobster moth (Neostauropus alternus Walker) on pigeonpea and its relation with different weather variables during kharif season of 2013-14 and 2014-15 under unprotected conditions at Pantnagar, Uttarakhand, India. The results revealed that the incidence of this insect commenced from the 34th standard week and it remained active up to 41st standard week of both the years. The insect showed one peak of its population during both the years. The maximum number of N. alternus was recorded on 37th standard week (5.6 larvae per plant) in 2013-14 while in 2014-15, population of N. alternus was highest in 38th standard week (4.8 larvae per plant). Correlation studies indicated that larval population of N. alternus exhibited a significant positive correlation with temperature whereas a significant negative correlation was established with relative humidity. Other abiotic factors had no significant effect on this insect pes...
International Journal of Basic and Applied Agricultural Research, 2015
India is the largest producer and consumer of pulses accounting for almost 33% of world area. The... more India is the largest producer and consumer of pulses accounting for almost 33% of world area. The chickpea marked a significant increase in area (9.96 million ha) for the year 2013-14 which is highest in last 10 years. Similarly, the chickpea production (9.92 million tonnes) also surpassed record with in the history of India since last 50 years (Anonymous, 2014). Helicoverpa armigera is a conundrum and one of the most dominant insect pests in agriculture, accounting for half of the total insecticides usage in India for protection of crops. The problem of this pest is magnified due to its direct attack on fruiting structures, voracious feeding habits, high mobility and fecundity, multivoltine nature, overlapping generations, nocturnal behaviour etc., (Sarode, 1999). At the same time adequate ecological data is prerequisite for integrated pest management, which can therefore be enhanced after determining the seasonal abundance (Mathur et al., 2003). There are many environmental factor...
During the course of investigation two pest species were observed viz., H. armigera and T. oricha... more During the course of investigation two pest species were observed viz., H. armigera and T. orichalcea on chickpea. The activity of both pests were ascertained from 11 to 17 and 12 to 16 standard week respectively for 2012-13, 2013-14. The minimal mean egg recorded on ICCV92944 and lowest larval population observed in ICCV07306, ICCV92944 respective years. The T. orichalcea larval population minimal recorded on ICCL86111, ICCV092944, Minimum pod damage in ICCV10, ICCV92944, ICCV97105 respective years. The maximum grain yield of 1491.67, 972.42 kg/ ha was found in ICCV097105, ICCV92944 respective years. The cultivars viz., ICCV92944, ICCV97105 and ICCV10 comes under least and moderately susceptible respectively for category based on damage rating scale of H. armigera. A negative and positive correlation with RH and Max Temp respectively for H .armigera, a positive correlation with sunshine hours with for T. orichalcea. The antibiosis studies in vegetative stage, lower leaf damaging wa...
Insights of antibiosis resistance in various chickpea cultivars against pod borer Helicoverpa arm... more Insights of antibiosis resistance in various chickpea cultivars against pod borer Helicoverpa armigera (Hubner) under laboratory condtions. The present study was carried out in order to investigate the level of resistance against H. armigera on different cultivars by adopting detach leaf and pod assay. In leaf detach assay, pooled mean of 2012 and 2013, significantly lower and maximum weight gain and percent gain recorded was 101.9 mg (88.5%); 382.3mg (317.4%), respectively for ICCV 097105 and ICCV 07306. During podding stage, lowest pod damage (%) was recorded 55 % (ICCV 92944) and highest pod damage recorded by ICC 3137, LL 550 and ICCV07306 (95 %).Highest pupal weight of one day old pupae was recorded on LL 550 (405.2 mg) and lower pupal weight in ICCV 097105 (202.4 mg). The present result gave clue for future in depth studies on weeds for developing either specific pheromone compound or repellant compound for the eco- friendly management of H. armigera.
Studies on seasonal abundance of the predatory bugs, Eocanthecona furcellata (Wolff.) and Rhynoco... more Studies on seasonal abundance of the predatory bugs, Eocanthecona furcellata (Wolff.) and Rhynocoris fuscipes (F.) on short duration pigeonpea variety Manak during 2012-14 revealed that the incidence of both the heteropteran bugs commenced from the 36th meteorological standard week and persisted up to 47th meteorological standard week of both the years. These bugs were found predating on larvae of spotted pod borer, Maruca vitrata (Geyer), one of the major insect pests of pigeonpea. Correlation studies with different weather variables indicated that the populations build up of these bugs exhibited a significant positive correlation with maximum temperature, minimum relative humidity and rainfall. In order to identify the semiochemical cues mediating the host seeking behavior of these predatory bugs towards M. vitrata, a laboratory experiment was conducted using four-arm olfactometer. The predatory bugs displayed a much higher preference for volatiles produced by M. vitrata infested ...
A laboratory experiment was conducted to find out the efficacy of selective botanicals and entomo... more A laboratory experiment was conducted to find out the efficacy of selective botanicals and entomopathogens against S. dorsalis on rose at different stages (bud, half opened flower and full opened flower). The half opened flowering stage of rose was found suitable in controlling S. dorsalis. Clothianidin 50 WDG (0.06 g/l) was found to control thrips population (94.78 %). Among the botanicals, 2 % Neem Seed Kernel Extract (NSKE) was found suitable, which controlled 69.08 % thrips and among entomopathogens Heterorhabditits indica (2000 IJs/ ml) recorded 67 % control.
The indiscriminate use of pesticides for the last 40 years has almost eliminated natural enemies ... more The indiscriminate use of pesticides for the last 40 years has almost eliminated natural enemies from many crop eco-systems. This scenario has led many countries to consider the potential of biological control as a component of pest management. At present, the world market for microbial pesticides is in excess of US $ 125 million per annum which is still less than 1 percent of the total global market for agrochemical crop protection of $ 20-25 billion. The viruses belonging to 11 families which are pathogenic to insects. Baculoviruses are associated with the orders of Lepidoptera Hymenoptera, Diptera, Neuroptera, Coleoptera, Trichoptera, Crustacea and mites (The virions are rod-shaped, 40-70 nm X 250-400 nm, comprising a lipoprotein envelope around a protein capsid containing DNA-protein core. Baculoviruses are one of the best alternative to chemical pesticides asthey are environment friendly. NPV is known for high epizootic levels and is naturally occurring, self-perpetuating, safe...
Screening of elite twenty chickpea cultivars of along with two desi checks PG 186 and L 550 was c... more Screening of elite twenty chickpea cultivars of along with two desi checks PG 186 and L 550 was carried out to evaluate for resistance to major pest Helicoverpa armigera. During the course of present investigation H. armigera was found to be major significance pest, which was mainly associated with leaves, flower and pod of chickpea. Present study revealed that, maximum mean egg and larval population were registered during 13th & 15th standard week respectively. The maximal and minimal number of mean egg population recorded of 12.86, 8.33 on ICC3137, D059 and 5.43, 3.60 on ICCV92944, respectively for 2012-13, 2013-14 seasons from selected five plants. The lowest larval population recorded of 23.33, 12.50 in ICCV07306, ICCV92944 and highest of 32.52, 22.39 in ICC3137, ICCV08107 in respective years. Per cent mean pod damage were ranged from 53.56 to 85.32 and 68.49 to 100 in respective years. The minimum grain yield of chickpea was recorded of 86.11, 158.33 kg/ha in ICCV07306, ICCV313...
The investigation was carried out to evaluate bioefficacy of biopesticides such as Jatropha oil, ... more The investigation was carried out to evaluate bioefficacy of biopesticides such as Jatropha oil, NSKE and NPV in various combinations along with control under chickpea-coriander intercropping ecosystem for three seasons against Helicoverpa armigera. The results revealed that the most effective treatment was T4 (chickpea; Jatropha treated) + coriander (NPV treated) followed by T9 (chickpea; Jatropha treated alone). The pooled mean of lowest damage for 3 years (2011, 2012, and 2013) was in chickpea (Jatropha treated) + coriander (NPV treated) treatments followed by chickpea (Jatropha treated) treatment alone. The mean grain yield of 1292 kg/ha was recorded for T4 treatment in chickpea (Jatropha at 5 mL/L) + coriander (NPV at 0.5 mL/L). The maximum coriander yield of 1008 kg/ha was obtained in T2 treatment, i.e., chickpea (NSKE treated) + coriander (untreated). The present results suggest that Jatropha curcas seed oil either alone or in combination with other biopesticides could be use...
Cowpea, Vigna unguiculata, is an important food crop in many tropical regions. The cowpea aphid, ... more Cowpea, Vigna unguiculata, is an important food crop in many tropical regions. The cowpea aphid, Aphis craccivora, Koch is a key pest of the crop. Olfactometer experiments were conducted in the laboratory to study the influence of host odour and population of conspecifics on apterae and alatae of cowpea aphid Aphis craccivora Koch. Among the four different host plants tested, more number of alatae responded to the allomonal cues emanating from cowpea leaves (1.6,) followed by that from glyricidia (1.4), dolichos (0.4) and groundnut (0.4). Apterous morphs also responded more to cowpea (1.6) followed by dolichos (0.6) groundnut (0.4) and glyricidia (0.2). The maximum retention time recorded inside the olfactometer for alate morph was on cowpea (360 seconds) followed by glyricidia (300seconds).Apterous morph recorded maximum retention time on glyricidia (300seconds) followed by cowpea (240 seconds). In response to host odour perception, it was observed that cowpea was the most preferre...
BIOINFOLET - A Quarterly Journal of Life Sciences, 2012
Thirty five cowpea genotypes were grouped into different categories based on the seed and seedlin... more Thirty five cowpea genotypes were grouped into different categories based on the seed and seedling morphological characters. Among all characters colour of seed coat, seed shape and seed size were found stable and uniform.
Field experiments were carried out to study the population dynamics of Lobster moth (Neostauropus... more Field experiments were carried out to study the population dynamics of Lobster moth (Neostauropus alternus Walker) on pigeonpea and its relation with different weather variables during kharif season of 2013-14 and 2014-15 under unprotected conditions at Pantnagar, Uttarakhand, India. The results revealed that the incidence of this insect commenced from the 34th standard week and it remained active up to 41st standard week of both the years. The insect showed one peak of its population during both the years. The maximum number of N. alternus was recorded on 37th standard week (5.6 larvae per plant) in 2013-14 while in 2014-15, population of N. alternus was highest in 38th standard week (4.8 larvae per plant). Correlation studies indicated that larval population of N. alternus exhibited a significant positive correlation with temperature whereas a significant negative correlation was established with relative humidity. Other abiotic factors had no significant effect on this insect pes...
International Journal of Basic and Applied Agricultural Research, 2015
India is the largest producer and consumer of pulses accounting for almost 33% of world area. The... more India is the largest producer and consumer of pulses accounting for almost 33% of world area. The chickpea marked a significant increase in area (9.96 million ha) for the year 2013-14 which is highest in last 10 years. Similarly, the chickpea production (9.92 million tonnes) also surpassed record with in the history of India since last 50 years (Anonymous, 2014). Helicoverpa armigera is a conundrum and one of the most dominant insect pests in agriculture, accounting for half of the total insecticides usage in India for protection of crops. The problem of this pest is magnified due to its direct attack on fruiting structures, voracious feeding habits, high mobility and fecundity, multivoltine nature, overlapping generations, nocturnal behaviour etc., (Sarode, 1999). At the same time adequate ecological data is prerequisite for integrated pest management, which can therefore be enhanced after determining the seasonal abundance (Mathur et al., 2003). There are many environmental factor...
During the course of investigation two pest species were observed viz., H. armigera and T. oricha... more During the course of investigation two pest species were observed viz., H. armigera and T. orichalcea on chickpea. The activity of both pests were ascertained from 11 to 17 and 12 to 16 standard week respectively for 2012-13, 2013-14. The minimal mean egg recorded on ICCV92944 and lowest larval population observed in ICCV07306, ICCV92944 respective years. The T. orichalcea larval population minimal recorded on ICCL86111, ICCV092944, Minimum pod damage in ICCV10, ICCV92944, ICCV97105 respective years. The maximum grain yield of 1491.67, 972.42 kg/ ha was found in ICCV097105, ICCV92944 respective years. The cultivars viz., ICCV92944, ICCV97105 and ICCV10 comes under least and moderately susceptible respectively for category based on damage rating scale of H. armigera. A negative and positive correlation with RH and Max Temp respectively for H .armigera, a positive correlation with sunshine hours with for T. orichalcea. The antibiosis studies in vegetative stage, lower leaf damaging wa...
Insights of antibiosis resistance in various chickpea cultivars against pod borer Helicoverpa arm... more Insights of antibiosis resistance in various chickpea cultivars against pod borer Helicoverpa armigera (Hubner) under laboratory condtions. The present study was carried out in order to investigate the level of resistance against H. armigera on different cultivars by adopting detach leaf and pod assay. In leaf detach assay, pooled mean of 2012 and 2013, significantly lower and maximum weight gain and percent gain recorded was 101.9 mg (88.5%); 382.3mg (317.4%), respectively for ICCV 097105 and ICCV 07306. During podding stage, lowest pod damage (%) was recorded 55 % (ICCV 92944) and highest pod damage recorded by ICC 3137, LL 550 and ICCV07306 (95 %).Highest pupal weight of one day old pupae was recorded on LL 550 (405.2 mg) and lower pupal weight in ICCV 097105 (202.4 mg). The present result gave clue for future in depth studies on weeds for developing either specific pheromone compound or repellant compound for the eco- friendly management of H. armigera.
Studies on seasonal abundance of the predatory bugs, Eocanthecona furcellata (Wolff.) and Rhynoco... more Studies on seasonal abundance of the predatory bugs, Eocanthecona furcellata (Wolff.) and Rhynocoris fuscipes (F.) on short duration pigeonpea variety Manak during 2012-14 revealed that the incidence of both the heteropteran bugs commenced from the 36th meteorological standard week and persisted up to 47th meteorological standard week of both the years. These bugs were found predating on larvae of spotted pod borer, Maruca vitrata (Geyer), one of the major insect pests of pigeonpea. Correlation studies with different weather variables indicated that the populations build up of these bugs exhibited a significant positive correlation with maximum temperature, minimum relative humidity and rainfall. In order to identify the semiochemical cues mediating the host seeking behavior of these predatory bugs towards M. vitrata, a laboratory experiment was conducted using four-arm olfactometer. The predatory bugs displayed a much higher preference for volatiles produced by M. vitrata infested ...
A laboratory experiment was conducted to find out the efficacy of selective botanicals and entomo... more A laboratory experiment was conducted to find out the efficacy of selective botanicals and entomopathogens against S. dorsalis on rose at different stages (bud, half opened flower and full opened flower). The half opened flowering stage of rose was found suitable in controlling S. dorsalis. Clothianidin 50 WDG (0.06 g/l) was found to control thrips population (94.78 %). Among the botanicals, 2 % Neem Seed Kernel Extract (NSKE) was found suitable, which controlled 69.08 % thrips and among entomopathogens Heterorhabditits indica (2000 IJs/ ml) recorded 67 % control.
The indiscriminate use of pesticides for the last 40 years has almost eliminated natural enemies ... more The indiscriminate use of pesticides for the last 40 years has almost eliminated natural enemies from many crop eco-systems. This scenario has led many countries to consider the potential of biological control as a component of pest management. At present, the world market for microbial pesticides is in excess of US $ 125 million per annum which is still less than 1 percent of the total global market for agrochemical crop protection of $ 20-25 billion. The viruses belonging to 11 families which are pathogenic to insects. Baculoviruses are associated with the orders of Lepidoptera Hymenoptera, Diptera, Neuroptera, Coleoptera, Trichoptera, Crustacea and mites (The virions are rod-shaped, 40-70 nm X 250-400 nm, comprising a lipoprotein envelope around a protein capsid containing DNA-protein core. Baculoviruses are one of the best alternative to chemical pesticides asthey are environment friendly. NPV is known for high epizootic levels and is naturally occurring, self-perpetuating, safe...
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