Studies on Seasonal Incidence and Management of Early Shoot Borer and Top Shoot Borers using New Insecticides in Sugarcane (Saccharum officinarum L.)
Abstract— The present investigation was carried out to Studies on seasonal incidence and management of early shoot borer and top shoot borers using new insecticides in sugarcane (Saccharum officinarum L.), at Institute of Agricultural Sciences, BHU, Varanasi, UP, India to assess the chemical control of sugarcane pest Chilo infuscatellus (Snellen) and Scirpophaga excerptalis (walker) with seven insecticide viz. Novaluron 10 EC @ 100 g a.i. ha-1, Fipronil 5 SC @ 150 g a.i. ha-1,
... 5 EC @ 25 g a.i. ha-1, Rynaxypyr 20 SC @ 40 g a.i. ha-1, Acetamiprid 20 SC@ 10 g a.i. ha-1, Spinosad 45 SC @ 100 g a.i. ha-1 and Emamactin benzoate 5 SG @ 10 g a.i. ha-1 and compared with untreated control using randomized block design with three replications and observations of dead heart per 10 hills recorded 1 day before spray and 7th, 15th, 30th days after spray. It was observed that infestation both early shoot borer and top shoot borer started from 23rd standard week with 2.45 and 1.23% dead heart per 10 hills respectively with the corresponding maximum, minimum and rainfall was 36.120C, 27.520C and 0.00 mm while the morning and evening RH 71% - 52%. The studies on efficacy of newer insecticide molecules on early shoot borer revealed that the Rynaxypyr 20 SC recorded lowest post treatment mean of (13.85% - 7.13%) over the other insecticidal treatments. On top shoot borer Rynaxypyr 20 SC showed lowest damage of (5.77% - 5.50%) over the other insecticidal treatments. yield of plot treated with Rynaxypyr 20 SC was higher (61.68 t/ha) than that of any other treatments.