Antixenosis mechanism of resistance in pigeonpea to the pod borer, Helicoverpa armigera |
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| Authors: | D. A. Kumari D. J. Reddy H. C. Sharma |
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| Affiliation: | International Crops Research Institute for the Semi-Arid Tropics, Patancheru Andhra Pradesh, India;;Department of Entomology, Acharya N G Ranga Agricultural University, Rajendranagar, Hyderabad, Andhra Pradesh, India |
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| Abstract: | Abstract: The noctuid pod borer, Helicoverpa armigera , is one of the most important pests of pigeonpea, and plant resistance is an important component for minimizing the extent of losses caused by this pest. To develop insect-resistant cultivars, it is important to understand the contributions of different components of resistance, and therefore, we studied the antixenosis mechanism of resistance to H. armigera in a diverse array of pigeonpea genotypes under no-choice, dual-choice, and multi-choice conditions. Antixenosis for oviposition was observed in case of ICPL 187-1, ICP 7203-1, ICPL 88039, T 21, ICPL 84060, and ICPL 332 under no-choice, dual-choice and multi-choice conditions. However, the number of eggs laid on ICPL 88039, T 21 and ICP 7203-1 did not differ significantly from those on ICPL 87 under dual-choice conditions. The susceptible check, ICPL 87 was highly preferred for oviposition. The genotypes ICP 7203-1, ICPL 187-1, T 21, ICPL 332, and ICPL 84060 can be used as sources of non-preference mechanism of resistance in pigeonpea improvement programs to breed for resistance to H. armigera . |
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| Keywords: | Helicoverpa armigera antixenosis pigeonpea resistance mechanisms |
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