ISHS Acta Horticulturae 153: IX African Symposium on Horticultural Crops
THE EFFECT OF WEEDS ON GROWTH AND SEED YIELD OF BEANS (PHAEOLUS VULGARIS) |
| Authors: | O.E.B. Balah, D.R. Basiime |
| Abstract:
Studies were conducted in 1979 and 1980 at the Field Station, University of Nairobi, to evaluate the growth and seed yield of dry bean, cv. Canadian Wonder, as influenced by competition from annual mixed weeds and various weeding treatments. Season-long weed competition reduced seed yields by an average of 49.5%. Pod number per plant was the most sensitive component of seed yield to weed competition. Weight per seed and seeds per pod were not affected. Growth, as measured by the total plant dry weight and the dry weights of roots, shoots and shoot components (leaves, stems and pods) was significantly reduced by weeds competing with the crop beyond 5 weeks after planting. Similarly, the leaf area index and axillary branching were reduced significantly by competition during and beyond the reproductive phase (6 – 8 weeks after planting). In respect of yield, however, there was no need to keep the crop free from weeds beyond 4 weeks from planting. | |
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