Influence of Planting Pattern and Weed Control Practices on Weed Growth and Productivity of Sweet Corn(Zea mays L.)

摘要

A field experiment was conducted during the rabi seasons of 2004 & 2005 at S.V.Agricultural College Farm, Tirupati, to study the effect of planting pattern and weed control practices on weed dynamics and productivity of sweet corn. Planting pattern of60x20 cm was effective in suppressing the weed growth at all the stages of crop growth and was comparable with 75x16 cm. The highest yield attributes were recorded with 60x25 cm and was on par with 75x20 cm. The highest green cob and green fodder yieldwere obtained with 60x20 cm, which were comparable with 75x16 cm due to the higher plant density of 83,333 plants ha~(-1) . Pre-emergence application of atrazine @ 1.0 kg ha~(-1) + hand weeding at 30 DAS recorded significantly lesser density and dryweight of weeds, higher weed control efficiency which resulted in enhanced level of yield attributes, green cob and fodder yield which were comparable with pre-emergence application of atrazine @ 1.0 kg ha~(-1) + post-emergence application of paraquat @ 0.5kg ha~(-1) at 30 DAS and hand weeding (HW) twice at 15 and 30 DAS.