Department of Entomology and Agricultural Zoology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi221005, Uttar Pradesh, India
*Email: saniyatyagi2311@gmail.com (corresponding author)
Online Published on 08 February, 2023.
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.
Pigeonpea, Helicoverpa armigera, Pod and seed damage, Host plant resistance, Biochemical traits, Morphological traits, Pod wall, Pod length, Trichome density, Susceptibility rating
