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.