Vol. 11, Issue 8 (2022)

Author(s):
Sonali Nakambam, PP Singh, Neeraj Kumar, Mohammad Abbas Ahmad, Kennedy Ningthoujam, Debanand Biswas, Irom Sangjukta and Yogesh Kumar Patel

Abstract:
The experiment was conducted at the Department of Entomology, Post Graduate College of Agriculture of Dr. Rajendra Prasad Central Agricultural University, Pusa, (Bihar) during two consecutive years i.e., 20220-2021 and 2021-2022 in completely Randomised Block Design with ten treatments and three replications. Each treatment consisting of 50 g of pigeon pea seeds in a plastic jar to which five pairs of adults were released in order to estimate the grain damage and weight loss. The observations were recorded at 30, 60, 90 and 120 days after insect release (DAIR). On the basis of pooled mean of the two years data, the lowest per cent grain damage and weight loss were recorded 0.87, 1.19, 2.14, 3.14 and 0.54, 0.65, 1.38, 1.81 per cent at 30, 60, 90 and 120 DAIR, respectively when seeds were treated with cypermethrin (10EC) @ 0.05 ml/kg seed as against untreated control (15.56, 36.37, 57.10, 74.89 % and 10.43, 16.03, 32.27 and 55.51 % grain damage and weight loss at 30, 60, 90 and 120 DAIR, respectively. All the treatments were found significantly superior over untreated control.