摘要 : Field experiments were conducted during dry and rainy seasons of 2008 at teaching and research farm of Bayero University, Kano to study the effect of various weed managements on yield and yield components of cowpea. The experiment... 展开 Field experiments were conducted during dry and rainy seasons of 2008 at teaching and research farm of Bayero University, Kano to study the effect of various weed managements on yield and yield components of cowpea. The experiments consisted of 15 treatments comprising 13 herbicide combinations with or without supplementary hoe weeding, two-hoe weeded and weedy check arranged in randomized complete block design with three replications. The experimental sites were largely dominated by broad-leaved weed species. Higher number of pods per plant, pod, grain and haulm yields per hectare were obtained by two-hoe weeded plots and pre-emergence application of atrazine and alachlor at 0.8 kg a. i./ha+diuron at 0.8 kg a. i./ha as well as atrazine and alachlor at 1.0 kg a. i./ha+diuron at 0.8 kg a. i./ha each with supplementary hoe weeding in both the seasons (P<=0.05). Weedy check plots significantly (P<=0.05) produced the highest weed dry matter, lowest number of pods per plant, and the least yields of pod, grain and haulms/ha. Grain yield was found to be significantly and positively correlated with number of pods per plant and pod yield/ha. The associations of weed dry weight and yield components were negative in both the seasons. 收起