Vol. 10, Issue 10 (2021)

Author(s):
Vikas Kumar, Pankaj Kumar, Shrawan Kumar Sahani and Chaman Kumar

Abstract:
Rice leaf folder, Cnaphalocrocis medinalis (Guenee) considered an important pest among several insect species which were recorded as pests of rice, as it affects rice production in almost all of the rice-growing countries of Asia. Hence, keeping in mind field experiments were conducted during Kharif season, 2018-2019 with rice variety (MTU-7029) to determine the bioefficacy of certain newer insecticides against rice leaf folder, and experiment was laid out in a randomized block design with nine treatments and three replications. Results revealed that among all the insecticides after the first and second spray least percent incidence was observed in the Cartap hydrochloride 50 WP (T5) followed by Flubendamide 480 SC (T1) and Rynaxypyr 20 SC (T2) treated treatment i.e., 3.57%, 4%, and 4.67% respectively. The highest incidence was recorded in the neem treated plot was found to be (5.50%) followed by lamda cyhalothrin (5.27%). Population densities of natural enemies significantly reduce in treated plots as compared to untreated plots, the highest number of natural enemies were recorded in T5, whereas the lowest was in T6.