Vol. 10, Issue 6 (2021)

Author(s):
PE Pakhare, Bharose AA, DG More and Thanu J Prabha

Abstract:
Helicoverpa armigera is major important polyphagous insect pests in agriculture which attacking at least 60 cultivated and 67 wild host plants from different families and it has a worldwide distribution. The experiments were conducted to study the biology and genetic diversity of H. armigera (Hubner) on different host plants vis., sunflower, pigeon pea, chickpea, cotton, brinjal. The growth index and larval duration of H. armigera was found to be 2.96, 4.08, 2.39, 3.86 and 2.96 and 19.48, 15.99, 22.20, 17.57, 15.16 days on Sunflower, chickpea, cotton, pigeon pea, brinjal, respectively. Set of 10 SSR primers used in this study, which generated total 22 amplicons among which 21 amplicons were polymorphic, with an average of 1.2 amplicons per primer. The PIC Value ranged from 0.32 to 0.81. With highest PIC recorded in HaSSR8. The similarity coefficient between the genotypes ranged from 0.45 to 0.91. Cluster analysis in which maximum similarity occur in sunflower and pigeon pea. Whereas cotton and brinjal showed minimum similarity with each other. So, it is help to prepare the best integrated pest management strategy of H. armigera and understand the veriability in their susceptibility to different insecticides, including Bacillus thuringiensis.