Effect of planting methods and levels of nitrogen on incidence of early shoot borer, Chilo infuscatellus Snellen in sugarcane

Abstract

A field experiment was conducted at the farm of Regional Research Station, Uchani, Karnal, CCS Haryana Agricultural University, Hisar during 2017-2018 to evaluate the effect of planting methods and levels of nitrogen on the incidence of early shoot borer, Chilo infuscatellus Snellen in some sugarcane genotypes. Two planting methods i.e. paired row and conventional method with three doses of nitrogen, 150, 180 and 210 kg/ha were tested on three differently maturing sugarcane varieties CoH 160 (early maturing), CoH 167 (mid maturing) and CoH 150 (late maturing) to observe their effect on the incidence of early shoot borer in sugarcane. The incidence of early shoot borer was maximum (7.14, 12.03 and 5.37%) in CoH 160 and the minimum (3.45, 4.81 and 2.96%) in CoH 167 during April, May and June, 2017, respectively. Early shoot borer incidence was minimum (3.94, 6.65 and 2.85%) at 150 kg N/ha and maximum (6.29, 9.32 and 4.76%) at 210 kg N/ha during April, May and June, respectively. With the present findings, it can be concluded that with the increase in nitrogen dose there was increase in the incidence of above mentioned pest. Incidence of early shoot borer was not affected significantly with different planting methods.