Screening of Groundnut Varieties against Bruchid, Caryedon serratus (Olivier)

Groundnut bruchid (Caryedon serratus Olivier) is one of the most important stored grain insect pests of groundnut. It adversely affects the quality and market acceptance of groundnut. The grub bore into pods and kernels causing damage by feeding on seeds internally. Therefore, an investigation on evaluation of varietal resistance of groundnut to bruchid, Caryedon serratus (Olivier) was carried out at the Department of Entomology, N.M. College of Agriculture, Navsari Agricultural University, Navsari during 2023 to 2024.

Screening of 10 groundnut varieties were carried out in completely randomized design with 3 repetitions. The reaction of varieties were assessed on the basis of adult emergence, pod damage and weight loss of pods after 60, 90 and 120 days of storage.

The groundnut varieties GJE-9 and GG-HIPS-2 were found least susceptible among 10 screened genotypes. While, varieties GJE-33, GG-38, GG-35, GJG-31, GG-20 and TG-37-A were found moderately susceptible. However, varieties GJG-32 and GJG-22 were found highly susceptible. Maximum per cent adult emergence, per cent pod damage and per cent weight loss were observed in GJG-32 variety and minimum in variety GJG-9.