Author(s): A. KUMARI AND R. PRASAD

Abstract: The field trials were experimented in rice variety Naveen during Kharif season of 2019 and 2020 at the rice research farm of College of Agriculture, Birsa Agricultural University, Kanke, Ranchi to investigate the efficacy of new molecules of insecticides against leaf folder. Nowadays evaluation of newer molecules of insecticides is very much essential for recommendation against insect pests to the farmers because so many widely used insecticides were restricted and prohibited for agricultural use in India. Three new combi products (Flubendamide 240 SC + thiacloprid 240 SC, spinetoram 6 SC + methoxyfenizide 30 SC, indoxacarb 14.5 SC + novaluron 7.7 SC with two different doses and one new molecule (flubendiamide 480 SC) with two different doses, one chemical control (cartap hydrochloride) and untreated control have been selected for this experiment. Novaluron 5.25 % SC + indoxacarb 4.5 SC @ 750 ml ha ^-1 recorded 1.15, 1.33 and 1.24 per cent leaf damage caused by leaf folder which was significantly superior over all treatments in the overall mean of both the years 2019, 2020 and pooled mean respectively, which is on par with novaluron 5.25 % SC +indoxacarb 4.5 SC @ 500 ml ha ^-1- (1.54, 1.66 and 1.60 % LDLF) but it is not performed better than flubendamide 240 SC + thiacloprid 240 SC @ 220 ml ha ^-1 (1.98, 2.30 and 2.14 % LDLF). Highest yield i.e. 50.58 q ha^-1 recorded in novaluron 5.25 % SC +indoxacarb 4.5 SC @ 750 ml ha^-1. Benefit cost analysis of the crop indicated that maximum net profit of Rs. 24,213/- obtained with the application of novaluron 5.25 % SC +indoxacarb 4.5 SC @ 750 ml ha^-1 with highest benefit cost ratio i.e. 3.21:1.

DOI: 10.22271/09746315.2021.v17.i2.1465

Download Full Article: Click Here