ASSESMENT OF DIFFERENT HERBICIDES ON YIELD AND ECONOMICS OF KHARIF MAIZE (ZEA MAYS L (original) (raw)

A field experiment was conducted at Agricultural College Farm, Bapatla on sandy clay loam soil during the kharif 2014 to study the effect of pre-emergence (Atrazine @ 1.0 kg a.i ha-1 and pendimethalin @ 1.0 kg a.i ha-1) and post-emergence (Topramezone @ 25 g a.i ha-1) herbicides on growth and yield of maize. Hand weeding at 20 and 40 DAS recorded the highest plant height, drymatter accumulation, kernel yield and harvest index, which was statistically on a par with atrazine @ 1.0 kg a.i ha-1 fb topramezone @ 25 g a.i ha-1 at 20 DAS and pendimethalin @ 1.0 kg a.i ha-1 fb topramezone @ 25 g a.i ha-1 at 20 DAS. The highest weed index (45.8%) was recorded in weedy check (T 1). The highest returns per rupee investment was recorded with atrazine @ 1.0 kg a.i ha-1 (PE) fb topramezone spray @ 25 g a.i ha-1 at 20 DAS (2.00) and was followed by pendimethalin @ 1.0 kg a.i ha-1 (PE) fb topramezone spray @ 25 g a.i ha-1 at 20 DAS (1.73) and where as the returns per rupee investment with hand weeding at 20 and 40 DAS (1.41).