Vol. 12, Issue 7 (2023)

Author(s):
M Venkateswara Reddy, K Umajyothi, P Syam Sundar Reddy and K Sasikala

Abstract:
During the Rabi season, an experiment was conducted at the Horticultural College and Research Institute, Dr. Y.S.R Horticultural University, Venkataramannagudem, Tadepalligudem, West Godavari District, A.P. on the effects of pre-and post-emergence herbicides on weed dynamics, growth parameters, yield attributes, and onion bulb yield. The experiment consisted of ten pre- and post-emergence herbicide treatments (Pendimethalin, Oxyflourfen, Imazethapyr, and Quizalofop-ethyle) and their mixtures, replicated in a random block design. Pendimethalin and oxyflourfen applied as pre-emergence along with 75 g of Quizalofop ethyl as post emergence were shown to be just as effective in increasing bulb production as hand weeding three times. Onion bulb output was inversely linked with weed dynamics, including overall weed density, weed dry weight, and weed nutrient uptake at onion harvest. While the mean bulb weight, length, and diameter of the bulb showed positive correlations with bulb output, as did the number of leaves per plant, leaf and bulb dry matter at harvest, and plant height.