Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

EFFECT OF VARIETY AND WEED MANAGEMENT ON THE YIELD PERFORMANCE OF BORO RICE (Pages : 6 - 15)

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh from December 2019 to May 2020 to investigate the effect of variety and weed management on the performance of Boro rice. Two rice varieties (BRRI dhan50 and BRRI dhan58) and six weed management practices (no weeding, two-hand weedings at 15 & 30 DAT, Three hand weedings at 15, 30 & 45 DAT, Application of pre-emergence herbicide superheat 500 EC @ 1 L ha-1 followed by one hand weeding at 30 DAT, Application of post-emergence herbicide super-power 10 WP @ 150 g ha-1 followed by one hand weeding at 30 DAT, Application of pre-emergence herbicide + post-emergence herbicide) were used as treatment. Eight weed species belonging to five families infested the experimental field. Among the eight species of weed, three were grasses, three were broad leaves and two were sedges. The selection of an appropriate weed management strategy helps reduce rice yield loss due to weeds. BRRI dhan58 produced a higher grain yield (3.62 t ha-1) than BRRI dhan50 (3.27 t ha-1). The highest grain yield (4.7 t ha-1) was obtained from the application of pre-emergence herbicide + post-emergence herbicide and the lowest value was obtained from no weeding (2.38 t ha-1). BRRI dhan58 × application of pre-emergence & post-emergence herbicide produced the highest grain yield (4.93 t ha-1) and the lowest grain yield (2.0 t ha-1) resulted from BRRI dhan50 × no weeding treatment. From the result of the study, it may be concluded that BRRI dhan58 × application of pre-emergence herbicide & post-emergence herbicide followed by one-hand weeding at 30 DAT may be recommended for controlling weeds effectively and for getting the highest grain yield in Boro rice. However, proper weed management and time of herbicide application are very important with respect to its efficiency. Download