Effect of variety, seed rate, and weeding frequency on weed infestation and grain yield of haricot bean
1997
Tenaw Workayehu | Beyenesh Zemichael | Waga Mazengia (Awasa Research Center (Ethiopia))
Haricot bean, which is not weeded on time, is affected by weed competition. Overlapping of activities and labor constraint are some of the problems for haricot bean production. A study was conducted to examine the impact of variety seed rate, and weeding frequency on weed infestation and bean grain yield. One or two weedings and the interaction of variety and seed rate suppressed weeds. Lower weed infestation was observed at the 40 kg/ha seed rate for all varieties. Weeding one or two times reduced weed infestation by 41 percent. Weed infestation reduced pods/plant, seed weight, plants/m squared at harvest and grain yield. Bean varieties have shown differences in leaf area, plants/m squared at harvest and grain yield. Increased seed rate increased bean plants/m squared and grain yield but decreased pods/plant. Grain yield was found to be positively correlated with plants/m squared (r = 0.63** ), pods/plant (r = 0.75** ), seed weight (r = 0.39* ) and leaf area (r = 0.5** ). Weed infestation (weeds/m squared) was negatively correlated with grain yield (r = 0.84**, 1992) and (-0.5*, 1993), pods/plant (r = 0.73** ) and plants/m squared at harvest (r = -0.61** )
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