Effect of cultural and chemical weed management on growth and yield of Drilled Paddy (Oryza sativa L.)

Abstract

An investigation was conducted at College of Agriculture, Nagpur to study the effect of Weed management in drilled paddy (Oryza sativa L.) during kharif season of 2014-2015. The experiment was laid down in Randomized block design having treatments viz., Control (T1), 2 hand weeding at 20 and 40 DAS (T2), Butachlor @ 1500 g a.i. ha-1 at 7 DAS (T3), Pretilachlor @ 750g a.i. ha-1 at 7 DAS (T4), 2, 4 D @ 1000 g a.i. ha-1 at 20 - 25 DAS (T5), Pyrazosulfuron ethyl @ 25 g a.i. ha-1 at 20 - 25 DAS (T6), Butachlor @ 1500 g a.i. ha-1 at 7 DAS + 2, 4 D @ 1000 g a.i.ha-1 at 20 - 25 DAS(T7), Butachlor @ 1500 g a.i. ha-1 at 7 DAS + Pyrazosulfuron ethyl @ 25 g a.i.ha-1 at 20 - 25 DAS (T8), Pretilachlor @ 750 g a.i. ha-1 at 7 DAS + 2, 4 D @ 1000 g a.i. ha-1 at 20 - 25 DAS (T9), Pretilachlor @ 750 g a.i. ha-1 at 7 DAS + Pyrazosulfuron ethyl @ 25 g a.i.ha-1 at 20 - 25 DAS (T10) thereby making Ten treatment combinations replicated three times. Rice variety PKV- Khamang was used as a test crop. Results showed that 2 hand weeding at 20 and 40 DAS (T2) significantly influenced the growth and yield attributing characters viz., Height of plant (cm), Number of effective tillers hill-1, Number of panicles hill-1, Number of grains panicle-1, Test weight (g), Yield of grains hill-1 (g), Yield of straw hill-1 (g), Yield of grains (q ha-1), Yield of straw (q ha-1), and Harvest index (%) and it was at par with treatments (T7), (T8), (T9), (T10).