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Effects of tropical weeds on yield in white yam dioscorea rotundata poir

, : Effects of tropical weeds on yield in white yam dioscorea rotundata poir. Weed Research 29(1): 1-6

The effects of tropical weeds on the yield of white yam were studied outdoors in wooden boxes. When the foliage and roots of weeds were in physical contact with the crop until harvest (full interference), tuber yield of yam was reduced by 76-79% of that obtained under weed-feed conditions over 3 years of study. When there was no physical contact between roots of crop and weeds, the leachate from the weed zone caused tuber yield reductions of 42, 40 and 38% in 1978, 1979 and 1980, respectively, when it was applied to the yam zone. This leachate also reduced leaf area index (LAI) in the yam crop but the adverse effects on yam root and shoot biomass were less pronounced. This technique made it possible to separate competitive interference from allelopathic interference of tropical weeds with the yam crop.

Accession: 007287835

DOI: 10.1111/j.1365-3180.1989.tb00833.x

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Related references

Unamma, R.P.A.; Akobundu, I.O., 1989: Effects of tropical weeds on yields in white yam (Dioscorea rotundata Poir). In studies in 1978-80, yams were grown outside in boxes in sterilised soil and separated from weed interference by plastic sheeting through which weed leachate was collected. Uncontrolled weed growth, where the foliage and roots of weeds were in c...

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