The on farm trials were conducted to determine the efficacy of conventional and novel insecticides against brown planthopper (BPH), Nilaparvata lugens (Stål), in rice during kharif 2017 and 2018. All the treatments were effective for BPH management than control. The results of the first year study revealed that the application of Imidacloprid 17.8 SL @ 100 ml ha -1 was found superior by registering lower population of BPH (4.70/ hill) followed by Flonicamid 50 WG @ 150 g ha -1 with 5.67 BPH/hill after 7 days after spray. However, during the second year trial conducted on different insecticides revealed that BPH population was recorded lowest i.e., 3.60 per hill with the application of Buprofezin 25 SC @ 1000 ml ha -1 after 10 days after spray. The effect of this insecticide application was also resulted in the highest grain yield (74.51 q/ha) and maximum benefit cost ratio (6.09).

Cotton is the most important cash crop of southern districts of Punjab. The productivity of the cotton crop is low due to vigorous attack by insect-pests. Among the insect-pests, cotton crop is heavily damaged by sucking pests. Among the sucking pest's thrips, Thrips tabaci create a setback to the early stages and reduces yield of cotton crop. Therefore, an on farm trial was conducted to evaluate the bioefficacy of novel insecticides viz., Spinetoram 11.7 SC, Diafenthiuron 50 WP and Thiamethoxam 25 WG against thrips on cotton crop. Results of the present study revealed that lowest population of thrips i.e., 3.03 per leaf was recorded with the treatment of Spinetoram 11.7 SC followed by Diafenthiuron 50 WP and Thiamethoxam 25 WG with record of 8.70 and 12.07 thrips per leaf, respectively after 10 days of spray. Similarly, the highest yield of cotton (21.25 q/ha) and benefit cost ratio (3.48) was observed the application of Spinetoram 11.7 SC.