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| White maize field at the Agronomy farm of Sher-e-Bangla Agricultural University (November, 2107 to April, 2018) |
VARIETAL PERFORMANCE OF WHITE MAIZE AS INFLUENCED BY DIFFERENT WEED MANAGEMENT PRACTICES
M. A. Mannan, Md. Jafar Ullah, Md. Mahirul Islam Biswas, Mst. Shammi Akter and Tahmina Ahmmed
Abstract
The experiment was conducted at the Agronomy Farm of Sher-e-Bangla Agricultural University, Dhaka during November 2017 to April 2018 to examine the varietal performances of white maize as influenced by different level of herbicides. The experiment comprised two varieties viz. PSC-121 and Yangnuo-3000 designed as V1 and V2 respectively combined with six weed control measures viz. T0 = No weeding, T1= Carfentrazone + Isoproturon 500g @ 1.5 g ha-1 (Affinity 50.75% WP), T2= Carfentrazone + Isoproturon 500g @ 2.0 g ha-1 (Affinity 50.75% WP), T3= Pendimethalin @ 2.0 l ha-1 (Panida 50EC), T4= Pendimethalin @ 3.0 l ha-1 (Panida 50EC) and T5= One hand weeding at 45 DAS. The experiment was laid out in split plot design with three replications. The highest plant height, leaf area index, crop growth rate, leaf area duration, 100-seed weight (35.67 g), grains cob-1 (426.5), grain yield (8.817 t ha-1), stover yield (7.35 t ha-1) and biological yield (16.17 t ha-1), WCE (74.24%), the lowest weed density (85.92 no. m-2) and biomass (95.056 g m-2) were achieved from T4. On the other hand, all the parameters studied were found lowest with T0. In case of variety, PSC-121 showed the superior performance in terms of weed density, weed biomass, weed control efficiency, plant height, leaf area index, crop growth rate, leaf area duration, 100-seed weight (33.89 g), number of grains cob-1 (412.0), grain yield (7.75 t ha-1), stover yield (6.12 t ha-1) and biological yield (13.87 t ha-1) over YANGNUO-3000. However, in terms of interaction of weed control measures and variety T4V1 showed the superior findings regarding weed density, weed biomass, weed control efficiency, plant height, leaf area index, leaf area duration and crop growth rate. This combination treatment also showed the highest values in 100-seed weight (40.33 g), number of grains cob-1 (445.6), grain yield (9.63 t ha-1) and biological yield (16.72 t ha-1) although in some instances these values were not significantly higher than T4V2. The lowest performances in respect of all the parameters studied were recorded from T0V2 which was in some cases was statistically at par when compared with T0V1. Keywords: White maize, Weed, Herbicides, Hand weeding.
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