Studies on weed management practices in Kharif maize (Zea mays L.)
Loading...
Date
2016
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Dr. Rajendra Prasad Central Agricultural University, Pusa (Samastipur)
Abstract
An experiment on “Studies on weed management practices in Kharif maize (Zea mays L.)” was conducted at TCA Dholi, farm, Muzaffarpur during Kharif 2015.The treatments comprised of atrazine, pendimethalin, halosulfuron, 2, 4-D, metribuzine, power weeder and hand weeding arranged in RBD design with twelve treatments. The soil of the experimental plot was alkaline in reaction (pH 8.3), medium in organic carbon andlow in available N, P2O5, K2O, S and Zn. QPM maize cultivar ‘Shaktiman-5’ was sown at a distance of 60 cm × 20 cm using the seed rate of 20 kg/ha with recommended package of practices.
Weed free (hand weeding twice at 20 DAS and 40 DAS) and atrazine @ 1.5 kg/ha (PE) fb halosulfuron @ 60 g/ha (PoE) provided significant weed control during the critical crop-weed competition period (upto 60 DAS). These treatments also recorded the lowest weed density, dry weight and weed index with higher weed control efficiency at all crop growth stages. Which contributes in highest yield attributes viz., cob/plant, grains/cob and test weight and grain yield (49.30 q/ha) and (48.50 q/ha) of maize along with net return ( 48,505 /ha) and ( 40,708/ha) which was found statistically at par with pendimethalin (1000 ml/ha) as (PE) fb atrazine (750 g/ha) + 2, 4-D dimethyl amine (75 %) at 25 DAS as (PoE). Uncontrolled weed growth reduced the grain yield to an extent to 37.40 %.
Highest B:C ratio (1.58) was recorded under by atrazine @ 1.5 kg/ha (PE) fb halosulfuron @ 60 g/ha (PoE) which was found statistically at par with pendimethalin (1000 ml/ha) as (PE) fb atrazine (750 g/ha) + 2, 4-D dimethyl amine (75 %) at 25 DAS as (PoE).
Description
Keywords
null