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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.

No MeSH data available.


Related in: MedlinePlus

Parasitization of 2ndinstar larvae ofH. armigerabyC. chlorideaefemales on different genotypes of pigeonpea under dual-choice conditions. The bars followed by the same letter are not statistically significant at P ≤ 0.05. RPP = Relative parasitization preference in relation to the susceptible check, ICPL 87. S-Susceptible, MR-Moderately resistant, R-Resistant, and W-Wild resistant.
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Fig2: Parasitization of 2ndinstar larvae ofH. armigerabyC. chlorideaefemales on different genotypes of pigeonpea under dual-choice conditions. The bars followed by the same letter are not statistically significant at P ≤ 0.05. RPP = Relative parasitization preference in relation to the susceptible check, ICPL 87. S-Susceptible, MR-Moderately resistant, R-Resistant, and W-Wild resistant.

Mentions: Under dual-choice conditions, when the parasitoid females were offered a choice between the test cultivar and the susceptible check, ICPL 87, greater parasitization was recorded in the larvae released on ICPL 87 than on the test cultivars. The differences were much larger in case of ICPL 84060 (18.39 vs 53.82%), T 21 (21.14 vs 51.94%), ICPL 332 WR (11.43 vs 47.20%) and ICPW 125 (2.08vs 24.62%) (Figure 2). The relative parasitization preference in relation to the susceptible check, ICPL 87 (RPP) by C. chlorideae on different test genotypes as compared to ICPL 87 ranged from -5.01 to -84.2%. Highest RPP of -84.2% was observed on ICPW 125, followed by ICPL 332WR (-61.01%), ICPB 2042 (-58.96%), ICPL 84060 (-49.07%) and T 21 (-42.14%) (Figure 3).Figure 2


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)

Parasitization of 2ndinstar larvae ofH. armigerabyC. chlorideaefemales on different genotypes of pigeonpea under dual-choice conditions. The bars followed by the same letter are not statistically significant at P ≤ 0.05. RPP = Relative parasitization preference in relation to the susceptible check, ICPL 87. 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

Fig2: Parasitization of 2ndinstar larvae ofH. armigerabyC. chlorideaefemales on different genotypes of pigeonpea under dual-choice conditions. The bars followed by the same letter are not statistically significant at P ≤ 0.05. RPP = Relative parasitization preference in relation to the susceptible check, ICPL 87. S-Susceptible, MR-Moderately resistant, R-Resistant, and W-Wild resistant.
Mentions: Under dual-choice conditions, when the parasitoid females were offered a choice between the test cultivar and the susceptible check, ICPL 87, greater parasitization was recorded in the larvae released on ICPL 87 than on the test cultivars. The differences were much larger in case of ICPL 84060 (18.39 vs 53.82%), T 21 (21.14 vs 51.94%), ICPL 332 WR (11.43 vs 47.20%) and ICPW 125 (2.08vs 24.62%) (Figure 2). The relative parasitization preference in relation to the susceptible check, ICPL 87 (RPP) by C. chlorideae on different test genotypes as compared to ICPL 87 ranged from -5.01 to -84.2%. Highest RPP of -84.2% was observed on ICPW 125, followed by ICPL 332WR (-61.01%), ICPB 2042 (-58.96%), ICPL 84060 (-49.07%) and T 21 (-42.14%) (Figure 3).Figure 2

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