S.V. NALAWADE, R.L. BHILARE, S.K. GHODAKE, K.D. BHOITE AND S.M. GANGURDE
Abstract
The field experiment was conducted during 2021-22 at Central Sugarcane Research Station, Padegaon Maharashtra to assess actual yield loss due to different species of borer pests of sugarcane in changing climatic scenario. There were two treatments, each 0.1 ha size plot for treated and untreated separated by keeping 100 meter distance. Treated plot applied with recommended effective chemical insecticide by soil application of Chlorantroniliprol 0.4 GR @ 18.75 kg/ha and foliar application of Chlorantroniliprol 18.5 % SC @ 375 g/ha following pair plot technique design. Percent infestation of early shoot borer was noticed at 30 DAP, 60 DAP, 90 DAP and 120 DAP in treated plot with recommended effective chemical insecticide were 2.59, 4.22, 6.93 and 0.83, respectively, while in untreated plot were 5.63, 8.06, 10.08 and 2.78, respectively. The cumulative percentage incidence of early shoot borer was found in 3.637 % in treated plot and 6.817 % in untreated plot. Total number of bored plants / ha was 3637 in treated plot and 6817 in the untreated plot. Whereas, per cent incidence of Internode borer in treated plot with recommended effective chemical insecticide and untreated plot showed a 1.50% and 4.40% in untreated plot, respectively. Top borer was not observed throughout the crop period in both plots. Among different treatments, plot treated with recommended effective chemical insecticide recorded highest germination percent (60.40 %), No. of milliable cane (87.50 thousands ha-1), Average cane weight (1.265 kg) and Yield (101.25 t/ha) in treated plot as against untreated plot. The brix percentage, purity percentage, sucrose content and CCS% in treated with recommended effective chemical insecticide were recorded as 23.37, 92.28, 20.96 and 14.22, respectively, while in untreated plot were recorded as 22.68, 89.68, 20.93 and 14.12, respectively.