EFFECT OF PRE AND POST EMERGENCE HERBICIDES ON WEED DYNAMICS, GROWTH, YIELD AND ECONOMICS OF BLACK GRAM (Vigna mungo L.)
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Date
2020-11-21
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Banda University of Agriculture & Technology, Banda-210001, Uttar Pradesh, India
Abstract
The field experiment was carried out at the Agricultural farm of Banda University of Agriculture and Technology, Banda on the prescribed topic "Effect of pre and post-emergence herbicides on weed dynamics, growth, yield, and economics of black gram (Vigna mungo L.)" during Kharif season of the year 2019. The experiment was laid out in a randomized block design with three replications and 10 treatments in a clayey loam having soil pH 7.7. The treatments consist of pre-emergence herbicides namely, Pendimethalin @ 0.75 kg a.i./ha and Imazethapyr @ 0.06 kg a.i./ha and post-emergence herbicides viz. Quizalofop-p-ethyl @ 0.05 kg a.i./ha, Halosufuron @ 27 g a.i./ha and Fenoxaprop-p-ethyl @ 0.10 kg a.i./ha applied at 25 DAS along with two checks i.e., weed free and weedy check (Hand weeding). During the field study, it was observed that prominent weed flora Cyperus rotundus (L.), Cynodon dactylon (L.), Saccharum spontaneum (L.), Phyllanthus niruri (L.), Digera arvensis, Ziziphus nummularia, Abelmoschus moschatus, Commelina benghalensis (L.) and Vigna radiata var. sublobata etc. were noticed and their effective and hasty control was also realized. The results revealed that weed-free treatment remained the best though found at par with herbicide layering of different molecules. Therefore, the simplest conclusion can be drawn from the present field study that herbicide layering of pre and post-emergent molecules namely, Pendimethalin @ 0.75 kg a.i.at 2 DAS followed by Quizalofop-p-ethyl@ 0.05 kg a.i. at 20 DAS per hectare was found the most effective and produced greater seed yield (1146 kg/ha), the total biomass of 3660 kg/ha, net returns (Rs. 50383/ha), and B:C ratio (3.28:1). However, weed-free produced the maximum seed yield of 1229 kg/ha but failed to be remunerative due to the intensive engagement of labour during two hand weedings at 20 DAS and 40 DAS. Thus generated technology holds promise for on-farm adoption for enhancing the yield productivity by minimizing weeds in terms of better weed control efficiency (77.89%) and weed index (6.67%) during Kharif season under the prevailing climatic conditions of Bundelkhand in general and Banda in particular.
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Kumar Vivek 2020. EFFECT OF PRE AND POST EMERGENCE HERBICIDES ON WEED DYNAMICS, GROWTH, YIELD AND ECONOMICS OF BLACK GRAM (Vigna mungo L.). M.Sc. Thesis. 88p.