Evaluation of pre sown application of granular insecticides against white grub ( Holotrichia longipennis ) infesting soybean grown under rain-fed condition of uttarakhand hill

Field experiment was conducted at research Station, Gaja, college of Forestry and Hill Agriculture, G. B. Pant university of Agriculture & technology, ranichauri to evaluate the various pre sown application of granular insecticides i.e. chlorpyriphos 10G (@2.0 kg a. i. ha−1), phorate 10G (@ 2.5 kg a.i. ha−1), carbofuran 3G (@0.75 kg a.i. ha−1), clothianidin 50 WdG (@ 0.12 kg a.i. ha−1), fipronil 0.3 G, (0.60 kg a.i. ha−1), thiamethoxam 25 WG (0.08 kg a.i. ha−1) and imidacloprid 70WG, (0.30 kg a.i. ha−1) against white grub infesting soybean grown under rain-fed condition of uttarakhand hill. result indicated that all the insecticidal treatments were found significantly superior with cumulative plant mortality of 8.20–15.18% as compared to untreated control where highest plant mortality was 28.67 percent. clothianidin 50 WdG applied 0.120 kg a.i. ha−1 proved to be most effective by registering lowest plant mortality (i.e. 6.94 and 8.20%) followed by imidacloprid 70WG @ 0.30 kg a.i ha−1 where the plant mortality was 8.99 and 8.5% during two consecutive years.