Weeds reduce the yield and quality of the common bean. During the 2019 main cropping season, the experiment was carried out at Guraferda and Menit Shasha Woreda in Southern Ethiopia (July to October). The goals were to see how pre-emergence herbicides and their combinations affected weed infestation, yield part, and yield of common bean, to see whether low-dose herbicides could be supplemented with hand weeding for effective weed control, and to evaluate the economic viability of various weed management practises. The experiment included 16 treatments: s-metholachlor (1.0,1.5, and 2.0 kg ha-1); pendimethalin (1.0,1.3,1.6 kg ha-1); s-metholachlor plus pendimethalin (1.0,1.3,1.6 kg ha-1); s-metholachlor plus pendimethalin (1.0,1.3,1.6 kg ha-1); s-metholachlor plus pendimethalin (1.0,1.3,1.6 kg ha-1); s-methol 1.0 kg ha-1+ 0.75 kg ha-1 pendimethalin, s-metholachlor at 0.75 kg ha-1+ pendimethalin at 1.0 kg ha-1, s-metholachlor at 0.75kg ha-1+pendimethalin at 1.25 kg ha-1, s-metholachlor at 1.0kg ha-1+one hand weeding at 5WAE, pendimethalin at 1.0 kg ha-1+ one hand weeding at 3WA At crop harvest, the combined use of one hand weeding at 5WAE with 1.0kg ha-1 of s-metholachlor and pendimethalin and two hand weeding at 2and 5 WAE showed lower weed dry biomass at both sites. The weed-free at Guraferda and MenitShasha yielded the highest grain yields (3715.7kg ha-1) and 3437.1kg ha-1, respectively. Grain yield losses were highest (79.48 percent and 67.64 percent, respectively) in weedy check plots at MenitShasha and Guraferda. The application of s-metholachlor at 1.0 kg ha-1 combined with one hand weeding at 5WAE yielded the highest net gain (Birr 27640.1 ha-1).
Please see the link : https://www.ikprress.org/index.php/PCBMB/article/view/5661
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