Effect of pre and post emergence herbicide on weed control in diect seeded lowland rice

Abstract

A field experiment was conducted during Kharif season of 2019-20 at Agronomy Research Farm, College of Agriculture, Nagpur, to study the effect of pre and post emergence herbicides on weed control in direct seeded lowland rice. Among the weed control treatment, the lowest dry matter of weeds and highest weed control efficiency was recorded by weed free treatment (T2) over rest of the treatments. Among herbicidal treatments, pre emergence application of Pretilachlor 50 EC @ 0.75 kg a.i. ha-1 fb post emergence application of Bispyribac sodium 10 SC @ 20 g a.i. ha-1 at 20 DAS fb hoeing at 35 DAS (T8) and pre emergence application of Oxydiargyl 6 % EC @ 100 g a.i. ha-1 fb post emergence application of Bispyribac sodium 10 SC @ 20 g a.i. ha-1 at 20 DAS fb hoeing at 35 DAS (T9) were found to reduce weed population thereby increasing weed control efficiency. Weed free check treatment being at par with herbicidal treatment provided most effective control of weeds throughout the crop growth period of direct seeded lowland rice, thereby improving growth and yield contributing characters and consequently recorded highest grain and straw yield.