EFFICACY OF ATRAZ1NE APPLICATION FOR CONTROLLING WEEDS IN SUGARCANE - GOBHI SARSON INTERCROP

摘要

A study was conducted to see the effect of higher dose of atrazine (up to 2500 g/ha) on pure crop of gobhi sarson (Brassica napus)) and to work out economics of using this herbicide for controlling weeds in sugarcane-gobhi sarson intercrop. Highest mean yield of 20.22 q/ha was obtained when 2500 g/ha of atrazine was applied al pre-emergence stage on pure crop of gobhi sarson. Atrazine application checked the weeds most effectively and there was no adverse effect of such a high dose of atrazine on gobhi sarson. Seed yield of gobhi sarson intercrop was the highest with 1500 g/ha atrazine when applied at post-emergence stage, which was about 3q/ha higher as compared to unweeded control. Cost of cultivation of both the crops using atrazinc spray was almost the same as compared to hand hoeings but was more in comparison to unweeded control. Increased net profit of Rs. 17168 per hactare was obtained when the crop was sprayed with 1500 g/ha atrazine at pre-emergence stage as compared to unweeded control.