Effect of herbicides combination for control of different weed flora in transplanted rice (Oryza sativa L.)

Abstract

A field experiment was conducted in rice during kharif season 2012 and 2013 on sandy loam soil at Crop Research Centre, Chirori of Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut (U.P.), to evaluate the effect of herbicides combination for control of different weed flora in transplanted rice. The experiment was conducted in R.B.D with three replications comprising twelve treatments (T1–Bispyribac-Na 25 g a.i. ha-1 25 DAT, T2–Pretilachlor1000 g a. i ha-1. 0-3 DAT, T3– Penoxsulam 22.5 g a. i. ha-1 8-12 DAT, T4–Pyrazosulfuron 20 g a.i. ha- 1 0-3 DAT, T5–Bispyribac + Ethoxysulfuron 25+18. g a.i. ha- 1 25 DAT, T6–Bispyribac +Almix 20+4 g a.i. ha-1 25 DAT, T7–Pretilachlor fb Ethoxysulfuron –75g a. i. ha-1 25 DAT, T8–Pretilachlor fb Almix 750/4 g a.i. ha- 1 25 DAT, T9–Pyrazosulfuron fb Hand weeding 20 g a. i. ha-1 0-3 fb 25 DAT, T10–Pretilachlor(6%) + Bensulfuron(0.6%) 660(10 kg/ha) 0-5 DAT, T11–two hand weeding at 20& 40 DAS and T12–weedy check.. The results indicated that Herbicides combination of weed control significantly reduced the weed population and their dry weight effectively over weedy check. Among the herbicide application Bispyribac +Almix 20+4 g a.i. ha-1 25 DAT was controlled the narrow and broad leaves weeds very effectively and recorded higher value of weed control efficiency and yield of rice. Thus, it may be concluded that application of Bispyribac +Almix 20+4 g a. i. ha-1 25 DAT as proved most superior than other treatment with respect to higher weed control efficiency and yield of rice.