2024, Vol. 7, Special Issue 7

author(s)
Priti Priya and Ankita

abstract
Rice (Oryza Sativa L.) is one of the most important cereal crops grown in India. Beside yellow stem borer, rice leaf folder (Cnaphalocrocis medinalis Gn.) is another new emerging important insect pest in rice. In recent years, leaf folders which were of minor importance have gained significant pest status, resulting in significant crop damage and production loss. The present experiment was conducted at the Rice Research Farm, BAU, Ranchi to evaluate the efficacy of different insecticides against rice leaf folder. All treatments were significantly superior to the control. Among all the ten treatments after first spray, lowest leaf damage was recorded in flubendiamide 240 SC + thiacloprid 240 SC (Belt Expert) @ 250 ml/ha (0.61%) and it remained statistically at par with flubendiamide 240 SC + thiacloprid 240 SC @ 200 ml/ha (1.01%) followed by flubendiamide 480 SC @ 50 ml/ha (1.58%) as compared to control (7.26%). In the second and third spray the lowest leaf damage was also recorded in flubendiamide 240 SC + thiacloprid 240 SC @ 250 ml/ha with (1.66%) and (2.11%) as compared to control (9.07%) and (12.07%) respectively. Highest grain yield of 46.50 q/ha and maximum B: C ratio (6.2:1) were recorded in the plot received three sprays of flubendiamide 240 SC + thiacloprid 240 SC @ 250 ml/ha.