Author(s): Bishan Singh, VS Hooda, Todarmal Poonia and SK Thakral

Abstract: To study the effect of different weed management practices, combination with intercultural operation and pre and post emergence herbicides on weeds and growth parameter of cotton, a field experiment was conducted during two consecutive seasons of kharif 2021 and 2022 at CCS Haryana Agricultural University, Hisar. The experimental field was pre dominantly infested with natural population of Trianthema portulacastrum (carpet weed), Digera arvensis (Digera), Echinochloa colona (wild rice) and Cyperus rotundus (Purple nutsedge). Two hoeing (25-30 DAS and 40-45 DAS) being at par with application of pendimethalin 1000 g/ha pre emergence at 35-40 DAS and pendimethalin 1000 g/ha pre emergence fb one hoeing after intercrop harvest, caused significant reduction in density, dry wt. of weeds and maximum plant height, dry matter accumulation and sympodial branches per plant as compared to weedy check up to harvest in both the years. Uncontrolled weeds reduced about 15% plant height and about 50% sympodial branches and plant dry matter accumulation of cotton as compared to weed free conditions.

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