VARIETAL PERFORMANCES OF WHITE MAIZE AS INFLUENCED BY DIFFERENT WEED MANAGEMENT PRACTICES

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 of two varieties viz. PSC-121 and YANGNUO-3000 designed as V 1 and V respectively combined with six weed control measures viz. T 0 = No weeding, T 2 = Carfentrazone + Isoproturon 500g @ 1.5 g ha -1 (Affinity 50.75% WP), T 2 1 = Carfentrazone + Isoproturon 500g @ 2.0 g ha -1 (Affinity 50.75% WP), T 3 = Pendimethalin @ 2.0 l ha -1 (Panida 50EC), T = Pendimethalin @ 3.0 l ha -1 (Panida 50EC) and T = One hand weeding at 45 DAS. The experiment was laid out in Split Plot Design with three replications. The highest plant height, leaf number per plant, leaf area index, crop growth rate, leaf area duration, 100-seed weight (35.67 g), grains per cob (426.5), grain yield (8.817 t ha -1 ), stover yield (7.35 t ha -1 5 ) and biological yield (16.17 t ha -1 ), WCE (74.24%) were achieved from T 4 . All the parameters studied were found lowest with T . In case of variety, PSC-121 showed the superior performance in terms of plant height, leaf number per plant, leaf area index, crop growth rate, leaf area duration, 100-seed weight (33.898g), grains cob yield (6.121 t ha -1 -1 (412.0), grain yield (7.758 t ha ), biological yield (13.878 t ha -1 -1 0 4 ), stover ) and harvest index (55.651%) over YANGNUO-3000. However, in terms of interaction, no single interaction was superior over other alternatives. But in most of the cases T showed the highest findings regarding the maximum leaf area index, leaf area duration, 100seed weight (40.33 g), grains per cob (445.6), grain yield (9.633 t ha ), biological yield (16.72 t ha -1 ) were recorded from T 4 V 1 , which however, was not significantly higher than those of T 1 V 1 (8.580 t ha -1

), T 3 V 1 4 V (8.593 t ha

(8.000 t ha -1 ) and the lowest performance almost in all the parameters was recorded from T 0 V 1 . 1 -1 -1 ) and T 4 V 2