This chapter describes the current status of coffee wilt disease (CWD, Gibberella xylarioides) in... more This chapter describes the current status of coffee wilt disease (CWD, Gibberella xylarioides) in Uganda, including its occurrence and distribution, its impact on coffee production, the factors affecting its severity and incidence, and country-specific practices for its control.
5. Gould, JC and Bowie, JH, Edinburgh Med. J., 1952, 59, 178. 6. Vanbreuseghem, R., Ann. Soc. Bel... more 5. Gould, JC and Bowie, JH, Edinburgh Med. J., 1952, 59, 178. 6. Vanbreuseghem, R., Ann. Soc. Belg. Med. Trop., 1952, 32, 173178. 7. Jain, N., Ph D thesis, Department of Bot-any, University of Rajasthan, Jaipur, 2002. 8. Shahi, KS, Shukla, AC, Bajaj, AK, Medgely, G. and Anupam ...
This chapter focuses on the development of a rapid molecular diagnostic method for the detection ... more This chapter focuses on the development of a rapid molecular diagnostic method for the detection of Ganoderma pathogenic to oil palm through the EU-STABEX-funded programme at the Papua New Guinea Oil Palm Research Association. The internal transcribed spacer (ITS) region of oil palm-associated isolates, selection of primer sites, evaluation of primer combination and their diagnostic capabilities are described. The ITS-based approach provides a single diagnostic method for the taxon which is independent of the infraspecific variation seen for many other characters. The results support the hypothesis that the basal stem rot organism occurs in a saprobic state on other dead palms, particularly coconuts.
This chapter presents evidence for the involvement of basidiospores in the epidemiology of basal ... more This chapter presents evidence for the involvement of basidiospores in the epidemiology of basal stem rot (Ganoderma boninense [Ganoderma orbiforme]) of oil palm. The three phases to the implementation of the control strategy (control during establishment, control during the growing cycle and control during replant) are described based on a control strategy developed and implemented in both Milne Bay in Papua New Guinea and in the Solomon Islands.
Three different trials to examine the cause of upper stem rot (USR) infection in oil palm failed ... more Three different trials to examine the cause of upper stem rot (USR) infection in oil palm failed to achieve any infection. In the first experiment, inoculum was applied as colonised rubber wood blocks or as spore suspensions. In the second experiment, particular attention was given to ensure that the Ganoderma spores were freshly collected to maintain viability but no infection was observed around the inoculation sites of any of the different oil palm tissues treated. Lastly in the third experiment, both monokaryotic and dikaryotic mycelial cultures were applied directly to cut fronds, which were protected with a moist covering, but no infection was detected after more than two years. Failure to achieve infection by direct inoculation would indicate that USR does not arise from direct infection of living tissues by Ganoderma spores or mycelium, this is probably because of insufficient inoculum potential to cause infection. It is suggested that USR infection is achieved only when a sufficiently large source of inoculum has built up in dead material, probably in frond axils, and this allows invasion of the living tissues.
... root-invading pathogens, notably Heterobasidion annosum (Woodward et al., 1998), cause of roo... more ... root-invading pathogens, notably Heterobasidion annosum (Woodward et al., 1998), cause of root ... debris (FD)] before subsequently invading the palm stem and causing disease (Flood ... Elaeis guineensis Jacq.) to basal stem rot caused by Ganoderma boninenseprospects for ...
... Molecular analysis of the major Phytophthora species on cocoa. AA Appiah 1,2, ,; J. Flood 2 ... more ... Molecular analysis of the major Phytophthora species on cocoa. AA Appiah 1,2, ,; J. Flood 2 ,; SA Archer 1 ,; PD Bridge 3,*,. ... Additional Information. How to Cite. Appiah, A., Flood, J., Archer, S. and Bridge, P. (2004), Molecular analysis of the major Phytophthora species on cocoa ...
... and Central Africa (Table 1). The species identities of isolates were confirmed by RFLP analy... more ... and Central Africa (Table 1). The species identities of isolates were confirmed by RFLP analysis and sequencing of the rDNA-ITS region (Appiah, 2001 ... 29, AK 2, 1998, T. cacao, A1, IIA, 3, 6·38, Ghana (ASH, Akomadan ... 160, TRIN 01, 1988, T. cacao, A2, IA, 1, 6·25, Trinidad (St Augustine ...
... of resistivity did vary depending on the method of estimation, environmental conditions and t... more ... of resistivity did vary depending on the method of estimation, environmental conditions and the ... The nature and location of variable hydraulic resistance in Heliantkus annuus L. (sunflower). ... Theeffect of VA mycorrhizal infection and phosphorus status on sunflower hydraulic and ...
This chapter describes the current status of coffee wilt disease (CWD, Gibberella xylarioides) in... more This chapter describes the current status of coffee wilt disease (CWD, Gibberella xylarioides) in Uganda, including its occurrence and distribution, its impact on coffee production, the factors affecting its severity and incidence, and country-specific practices for its control.
5. Gould, JC and Bowie, JH, Edinburgh Med. J., 1952, 59, 178. 6. Vanbreuseghem, R., Ann. Soc. Bel... more 5. Gould, JC and Bowie, JH, Edinburgh Med. J., 1952, 59, 178. 6. Vanbreuseghem, R., Ann. Soc. Belg. Med. Trop., 1952, 32, 173178. 7. Jain, N., Ph D thesis, Department of Bot-any, University of Rajasthan, Jaipur, 2002. 8. Shahi, KS, Shukla, AC, Bajaj, AK, Medgely, G. and Anupam ...
This chapter focuses on the development of a rapid molecular diagnostic method for the detection ... more This chapter focuses on the development of a rapid molecular diagnostic method for the detection of Ganoderma pathogenic to oil palm through the EU-STABEX-funded programme at the Papua New Guinea Oil Palm Research Association. The internal transcribed spacer (ITS) region of oil palm-associated isolates, selection of primer sites, evaluation of primer combination and their diagnostic capabilities are described. The ITS-based approach provides a single diagnostic method for the taxon which is independent of the infraspecific variation seen for many other characters. The results support the hypothesis that the basal stem rot organism occurs in a saprobic state on other dead palms, particularly coconuts.
This chapter presents evidence for the involvement of basidiospores in the epidemiology of basal ... more This chapter presents evidence for the involvement of basidiospores in the epidemiology of basal stem rot (Ganoderma boninense [Ganoderma orbiforme]) of oil palm. The three phases to the implementation of the control strategy (control during establishment, control during the growing cycle and control during replant) are described based on a control strategy developed and implemented in both Milne Bay in Papua New Guinea and in the Solomon Islands.
Three different trials to examine the cause of upper stem rot (USR) infection in oil palm failed ... more Three different trials to examine the cause of upper stem rot (USR) infection in oil palm failed to achieve any infection. In the first experiment, inoculum was applied as colonised rubber wood blocks or as spore suspensions. In the second experiment, particular attention was given to ensure that the Ganoderma spores were freshly collected to maintain viability but no infection was observed around the inoculation sites of any of the different oil palm tissues treated. Lastly in the third experiment, both monokaryotic and dikaryotic mycelial cultures were applied directly to cut fronds, which were protected with a moist covering, but no infection was detected after more than two years. Failure to achieve infection by direct inoculation would indicate that USR does not arise from direct infection of living tissues by Ganoderma spores or mycelium, this is probably because of insufficient inoculum potential to cause infection. It is suggested that USR infection is achieved only when a sufficiently large source of inoculum has built up in dead material, probably in frond axils, and this allows invasion of the living tissues.
... root-invading pathogens, notably Heterobasidion annosum (Woodward et al., 1998), cause of roo... more ... root-invading pathogens, notably Heterobasidion annosum (Woodward et al., 1998), cause of root ... debris (FD)] before subsequently invading the palm stem and causing disease (Flood ... Elaeis guineensis Jacq.) to basal stem rot caused by Ganoderma boninenseprospects for ...
... Molecular analysis of the major Phytophthora species on cocoa. AA Appiah 1,2, ,; J. Flood 2 ... more ... Molecular analysis of the major Phytophthora species on cocoa. AA Appiah 1,2, ,; J. Flood 2 ,; SA Archer 1 ,; PD Bridge 3,*,. ... Additional Information. How to Cite. Appiah, A., Flood, J., Archer, S. and Bridge, P. (2004), Molecular analysis of the major Phytophthora species on cocoa ...
... and Central Africa (Table 1). The species identities of isolates were confirmed by RFLP analy... more ... and Central Africa (Table 1). The species identities of isolates were confirmed by RFLP analysis and sequencing of the rDNA-ITS region (Appiah, 2001 ... 29, AK 2, 1998, T. cacao, A1, IIA, 3, 6·38, Ghana (ASH, Akomadan ... 160, TRIN 01, 1988, T. cacao, A2, IA, 1, 6·25, Trinidad (St Augustine ...
... of resistivity did vary depending on the method of estimation, environmental conditions and t... more ... of resistivity did vary depending on the method of estimation, environmental conditions and the ... The nature and location of variable hydraulic resistance in Heliantkus annuus L. (sunflower). ... Theeffect of VA mycorrhizal infection and phosphorus status on sunflower hydraulic and ...
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