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Abstract
Various weed control practices were evaluated during the 1985 (November planting) and 1986 (June planting) wet seasons in Ane‐i, Claveria, Misamis Oriental, to determine suitable weed control practices for cowpea (Vigna unguiculata (L.) Walp. IT82D‐889). Weed species associated with the crop varied with planting time. Borreria laevis (Lam.) Griseb. and Digitaria setigera Roth ex R.&S. were the dominant weed species in the 1985 and 1986 wet seasons, respectively. Despite variations in weed species and population, hoe weeding plus hand weeding at 14 and 28 days after emergence (d.a.e.) significantly reduced weed weight and resulted in the highest grain yield, net return, marginal benefit‐cost ratio (MBCR) and dominated other weed control practices in terms of net return at a given cost of weed control.