Weed management through early post-emergence herbicides to improve productivity and nutrient uptake in greengram Poornima S.*,1, Lakshmi Y. Siva1, Prakash T. Ram1, Srinivas A.1 1Department of Agronomy, College of Agriculture, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad, 500 030 *Email: poornishanmugam97@gmail.com
Abstract A field experiment was conducted at College of Agriculture, PJTSAU, Rajendranagar, Hyderabad (Telangana) during rainy season 2015–16 on sandy loam soil to study the weed growth, yield and nutrient uptake in greengram under different early post-emergence herbicide treatments. Lower density and dry matter of weeds was recorded with hand weeding at 20 and 40 DAS followed by haloxyfop-p-methyl 135 g/ha + imazethapyr 75 g/ha at 12–15 DAS as early post-emergence, which remained at par with quizalofop-ethyl 50 g/ha + imazethapyr 75 g/ha at 12–15 DAS. Hand weeding twice at 20 and 40 DAS showed the highest uptake of N, P and K, which was comparable with haloxyfop-p-methyl 135 g/ha + imazethapyr 75 g/ha at 12–15 DAS and quizalofop-ethyl 50 g/ha + imazethapyr 75 g/ha at 12–15 DAS. Significantly higher seed yield was observed with hand weeding at 20 and 40 DAS (1.09 t/ha) which remained at par with haloxyfop-p-methyl 135 g/ha + imazethapyr 75 g/ha at 12–15 DAS (1.03 t/ha) and quizalofop-ethyl 50 g/ha + imazethapyr 75 g/ha at 12–15 DAS (1.01 t/ha). Top Keywords Haloxyfop-p-methyl, Herbicides, Imazethapyr, Nutrient uptake, Weed management. Top |