Factors limiting the expansion of summer pulses [in Bangladesh]
1989
Rahman, M.M.
The Bangladesh Agricultural Research Institute released a mung bean (Vigna radiata (L.) Wilczek) cultivar Mubarik, in 1982 and identified several black gram (Vigna mungo (L.) Hepper) lines for cultivation in the early-monsoon (kharif-l) season, and in the post rainy crop-mung bean-T. aman (rainy season) rice fallow cropping pattern, to replace Aus (rainfed) rice. This has not found favor with farmers in the targeted areas mainly due to the uncertain weather during this season. The crop must be sown before March, otherwise it is badly damaged by excessive rain and humidity at maturity. Excessive moisture may delay maturity and result in the seed rotting within the pods. About 60-65% of mature pods of Mubarik can be harvested at 65-70 days, but a complete harvest may take up to 3 months and hand picking is uneconomical yellow mosaic virus (YMV) damage reduces yields substantially. A large area remains fallow between the early monsoon and postrainy seasons. This period is designated as late monsoon (kharif II). Kanti, another cultivar of mung bean was released in 1987 for cultivation in this season. We propose to lay relatively more emphasis on the development of short duration YMV and Cercospora leaf spot-resistant cultivars which can tolerate some waterlogging. These will fit the Aus (rainfed) rice-jute-mungbean postrainy season crop in the northern and the T. aman-mung bean-Aus rice cropping pattern in the southern parts of the country.
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