Effect of Pre and Early Post Emergence Herbicides on Weeds and Productivity of Blackgram under Irrigated Conditions

摘要

A field experiment was conducted at Agricultural College and Research Institute, Killikulam during Purattasipattam (September 2017 - November 2017) to evaluate the effect of pre and early post emergence herbicides on weeds and productivity of blackgram under irrigated conditions. Twelve treatments were tested in randomized block design with three replications. Among the weed control treatments, PE application of oxyfluorfen @ 0.18 kg ha"1 + EPOE application of Imazethapyr @ 0.05 kg ha1 on 20 DAS recorded significantly lower total weed density (22.92 m2), total weed dry weight (19.94 g m2) and higher weed control efficiency (93.2 %) than rest of the treatments including weedy check but it was on par with the PE application of pendimethalin @ 1.0 kg ha-1 + EPOE Imazethapyr @ 0.05 kg ha 1 on 20 DAS as compared to weed free check. The same treatments also resulted in significantly higher grain and haulm yields.