Effect of crop density and herbicides on weed dynamics and yield of maize (Zea mays)

A field experiment was conducted at the Agricultural Research Farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi during rainy season of 2022 to study the effect of plant crop geometry and herbicide treatment on weeds, growth and yield of rainy maize. The experiment was conducted in a Randomized Complete Block Design design with two factors, crop geometry and weed management. In crop geometry, lower weed density and dry weight was observed in 60 cm × 15 cm as compared to 60 cm × 20 cm. However, atrazine 1.0 kg/ha fb topramezone 25.2 g/ha at 25 DAS recorded lower weed density and dry weight in comparison to atrazine 1.0 kg/ha fb halosulfuron 67.5 g/ha at 25 DAS except Cyperus esculentus. Significantly higher grain yield (0.51 t/ha) was registered in atrazine 1.0 kg/ha fb topramezone 25.2 g/ha at 25 DAS as compared to atrazine 1.0 kg/ha fb halosulfuron 67.5 g/ha at 25 DAS (0.47 t/ha).