Morphological and biochemical basis of resistance to pod borer Helicoverpa armigera in pigeonpea
Autor: | Saniya Tyagi, Ram Keval, Sunil Verma, Dhruba Narayan Kohar |
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Rok vydání: | 2021 |
Předmět: | |
Zdroj: | Indian Journal of Entomology. :1-5 |
ISSN: | 0974-8172 0367-8288 |
Popis: | This study evaluates sources of resistance to the pod borer Helicoverpa armigera (Hubner) in 15 long duration pigeonpea genotypes with experiments done during 2017-19. Association of morphological and biochemical traits was also evaluated. The results revealed that the least pod damage was attributed to high phenol content in pods (-0.668**), seeds (-0.719**) and high trichomes density (-0.637*). The susceptibility of genotypes (IVT-1-903, IVT-12-904, IVT-703) was indicated by their high pest susceptibility rating (PSR), and due to greater pod length (0.563*) and width (0.603**). The activity of protein, reducing sugars, chlorophyll, carbohydrates, pod wall thickness and number of seeds/ pod was also studied. Genotypes IVT-705, IVT-706 and IVT-1-901 emerged out to be the least susceptible (PSR = 4). Role of these traits are discussed to identify basis of resistance. |
Databáze: | OpenAIRE |
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