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Pigeonpea genotypes influence parasitization preference and survival and development of the Helicoverpa armigera larval parasitoid, Campoletis chlorideae.

Hugar SV, Sharma HC, Basavan Goud K - Springerplus (2014)

Bottom Line: Studies were undertaken to identify pigeonpea, Cajanus cajan (L.) Millspaugh and the wild relative of pigeonpea, Cajanus scarabaeoides (L.) (accession ICPW 125,) genotypes that are hospitable to the pod borer, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) larval parasitoid, Campoletis chlorideae Uchida (Hymenoptera: Ichneumonidae) for the management of this pest in pigeonpea based cropping systems.Lowest parasitization was recorded on the wild relative, ICPW 125, which may be due to long nonglandular hairs and low survival of H. armigera larvae.The genotypes ICPL 87, ICPL 87119, LRG 42 and ICPL 87091 that are hospitable to C. chloridae, are better suited for use in integrated pest management to minimize the losses due to H. armigera in pigeonpea.

View Article: PubMed Central - PubMed

Affiliation: International Crops Research Institute for the Semi-Arid Tropics, Patancheru, 502324 Andhra Pradesh India ; Department of Agricultural Entomology, College of Agriculture, University of Agricultural Sciences (UAS), Dharwad, 580005 Karnataka, India.

ABSTRACT
Studies were undertaken to identify pigeonpea, Cajanus cajan (L.) Millspaugh and the wild relative of pigeonpea, Cajanus scarabaeoides (L.) (accession ICPW 125,) genotypes that are hospitable to the pod borer, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) larval parasitoid, Campoletis chlorideae Uchida (Hymenoptera: Ichneumonidae) for the management of this pest in pigeonpea based cropping systems. Percentage parasitization of the H. armigera larvae by the C. chlorideae females was greater under no-choice conditions than under multi-choice conditions because of forced parasitization under no-choice conditions. Lowest parasitization was recorded on the wild relative, ICPW 125, which may be due to long nonglandular hairs and low survival of H. armigera larvae. Parasitization of H. armigera larvae was greater under no-choice, dual-choice and/or multi-choice conditions on ICPL 87, ICPL 87119 and ICPL 87091, which are susceptible to H. armigera, than on the pod borer-resistant genotypes ICPL 332WR, ICPL 84060 and ICPB 2042; while survival and development of the parasitoid was better on H. armigera larvae fed on ICPL 87, ICPL 87119, LRG 41, ICP 7035 and ICPL 87091 than on ICPL 332WR, ICPL 84060, ICPB 2042 and ICPW 125. The genotypes ICPL 87, ICPL 87119, LRG 42 and ICPL 87091 that are hospitable to C. chloridae, are better suited for use in integrated pest management to minimize the losses due to H. armigera in pigeonpea.

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Related in: MedlinePlus

Influence of different pigeonpea genotypes on parasitization ofH. armigeralarvae byC. chlorideaefemales under no-choice and multi-choice conditions. The bars followed by the same letter (upper or lower case) are not statistically significant at P ≤ 0.05. S-Susceptible, MR-Moderately resistant, R-Resistant, and W-Wild resistant.
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Fig1: Influence of different pigeonpea genotypes on parasitization ofH. armigeralarvae byC. chlorideaefemales under no-choice and multi-choice conditions. The bars followed by the same letter (upper or lower case) are not statistically significant at P ≤ 0.05. S-Susceptible, MR-Moderately resistant, R-Resistant, and W-Wild resistant.

Mentions: Under no-choice cage conditions, there were significant differences in larval parasitization on different pigeonpea genotypes, and highest parasitization was recorded on ICPL 87 (61.74%), followed by ICPL 87119 (52.55%), ICPL 87091 and (41.39%) (Figure 1). Larval parasitization was quite low (4.50–23.41%) on T 21, ICP 7035, LRG 41, ICPL 84060, ICPL 332WR, and ICPB 2042, suggesting that these genotypes were not hospitable to the larval parasitoid, C. chlorideae. Least larval parasitization was observed on the pigeonpea wild relative, C. scarabaeoides accession ICPW 125 (2.00%), probably because of the presence of long hairs and/or chemicals that may be repellent to the adult wasps, and the possible adverse effects of secondary metabolites in this accession on the parasitoid survival and development.Figure 1


Pigeonpea genotypes influence parasitization preference and survival and development of the Helicoverpa armigera larval parasitoid, Campoletis chlorideae.

Hugar SV, Sharma HC, Basavan Goud K - Springerplus (2014)

Influence of different pigeonpea genotypes on parasitization ofH. armigeralarvae byC. chlorideaefemales under no-choice and multi-choice conditions. The bars followed by the same letter (upper or lower case) are not statistically significant at P ≤ 0.05. S-Susceptible, MR-Moderately resistant, R-Resistant, and W-Wild resistant.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4125606&req=5

Fig1: Influence of different pigeonpea genotypes on parasitization ofH. armigeralarvae byC. chlorideaefemales under no-choice and multi-choice conditions. The bars followed by the same letter (upper or lower case) are not statistically significant at P ≤ 0.05. S-Susceptible, MR-Moderately resistant, R-Resistant, and W-Wild resistant.
Mentions: Under no-choice cage conditions, there were significant differences in larval parasitization on different pigeonpea genotypes, and highest parasitization was recorded on ICPL 87 (61.74%), followed by ICPL 87119 (52.55%), ICPL 87091 and (41.39%) (Figure 1). Larval parasitization was quite low (4.50–23.41%) on T 21, ICP 7035, LRG 41, ICPL 84060, ICPL 332WR, and ICPB 2042, suggesting that these genotypes were not hospitable to the larval parasitoid, C. chlorideae. Least larval parasitization was observed on the pigeonpea wild relative, C. scarabaeoides accession ICPW 125 (2.00%), probably because of the presence of long hairs and/or chemicals that may be repellent to the adult wasps, and the possible adverse effects of secondary metabolites in this accession on the parasitoid survival and development.Figure 1

Bottom Line: Studies were undertaken to identify pigeonpea, Cajanus cajan (L.) Millspaugh and the wild relative of pigeonpea, Cajanus scarabaeoides (L.) (accession ICPW 125,) genotypes that are hospitable to the pod borer, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) larval parasitoid, Campoletis chlorideae Uchida (Hymenoptera: Ichneumonidae) for the management of this pest in pigeonpea based cropping systems.Lowest parasitization was recorded on the wild relative, ICPW 125, which may be due to long nonglandular hairs and low survival of H. armigera larvae.The genotypes ICPL 87, ICPL 87119, LRG 42 and ICPL 87091 that are hospitable to C. chloridae, are better suited for use in integrated pest management to minimize the losses due to H. armigera in pigeonpea.

View Article: PubMed Central - PubMed

Affiliation: International Crops Research Institute for the Semi-Arid Tropics, Patancheru, 502324 Andhra Pradesh India ; Department of Agricultural Entomology, College of Agriculture, University of Agricultural Sciences (UAS), Dharwad, 580005 Karnataka, India.

ABSTRACT
Studies were undertaken to identify pigeonpea, Cajanus cajan (L.) Millspaugh and the wild relative of pigeonpea, Cajanus scarabaeoides (L.) (accession ICPW 125,) genotypes that are hospitable to the pod borer, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) larval parasitoid, Campoletis chlorideae Uchida (Hymenoptera: Ichneumonidae) for the management of this pest in pigeonpea based cropping systems. Percentage parasitization of the H. armigera larvae by the C. chlorideae females was greater under no-choice conditions than under multi-choice conditions because of forced parasitization under no-choice conditions. Lowest parasitization was recorded on the wild relative, ICPW 125, which may be due to long nonglandular hairs and low survival of H. armigera larvae. Parasitization of H. armigera larvae was greater under no-choice, dual-choice and/or multi-choice conditions on ICPL 87, ICPL 87119 and ICPL 87091, which are susceptible to H. armigera, than on the pod borer-resistant genotypes ICPL 332WR, ICPL 84060 and ICPB 2042; while survival and development of the parasitoid was better on H. armigera larvae fed on ICPL 87, ICPL 87119, LRG 41, ICP 7035 and ICPL 87091 than on ICPL 332WR, ICPL 84060, ICPB 2042 and ICPW 125. The genotypes ICPL 87, ICPL 87119, LRG 42 and ICPL 87091 that are hospitable to C. chloridae, are better suited for use in integrated pest management to minimize the losses due to H. armigera in pigeonpea.

No MeSH data available.


Related in: MedlinePlus