Efficacy of different weed management strategies in mungbean (Vigna radiata L.)
2001
Aslam, Z.
Two hands weeding (15 + 30 DAS) significantly suppressed the density and dry weight of weeds. Sorgaab + S. metolachlor, S. metolachlor alone gave very impressive results on the density and dry weight of purple nutsedge (deela) and sorgaab + pendimethalin and pendimethalin alone controlled the density and dry weight of horse purslane and it had little effect on purple nutsedge. Foliar sorgaab sprays 15+ 30 DAS also increased the yield but it was statistically on par with other treatments. Dry weight of all weeds recorded on 60 DAS was reduced to maximum (79%) by 2 hand weedings and was statistically on combined: spray of sorgaab + S. metolachlor and sorgaab + pendimethalia which reduced the total dry weight by 78 and 75% over control respectively. Maximum leaf area per plant, number of branches per plant, plant height, number of grains per pod, number of pods per plant and 1000-grain weight were obtained by two hand weeding (15+30 DAS) followed by sorgaab + S. metolachlor and sorgaab + pendimethalin. The economic and marginal analysis of the treatments revealed that two hand weedings (15 + 30 DAS) was the best treatment which lead to maximum net benefits and was followed by sorgaab + S. metolachlor and sorgaab + pendimethalin. However, the marginal analysis showed that sorgaab + pendimethalin and two hand weeding (15+30 DAS) had 6891.46 and 170.0% marginal rate of returns, respectively. So it is apparent that sorgaab with reduced dose of pendimethalin, two hand weedings, sorgaab with reduced dose of S. metolachlor and two Sorgaab sprays were the only economical treatments with maximum net benefit high marginal rate of return. On the basis of the results of this study it could be suggested that sorgaab with reduced doses of herbicides may be used as natural and economical weed inhibitor in mungbean.
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