The performance of cowpea (Vigna unguiculata (L.) Walp) as influenced by weed competition

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Abstract
Summary: Experiments were made in a glasshouse and in the field to estimate the effect of weed competition on cowpea performance.In the glasshouse experiment, plant height, number of nodes, green leaves, peduncles, weight of poda and seeds of cowpea were decreased by competition from Euphorbia heterophylla and the decrease was greater with increasing density of the weed associate. Generally cowpea did not respond to application of fertilizers. In the field experiment, competition from the natural weed flora affected the number of days to 50% flowering and yield components of the four cowpea varieties studied. The yield of the climbing variety, Dinner, was least affected by competition whilst the semi-erect variety, Ife brown, was the most affected.

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