Abstract
Abstract The critical period of weed interference was investigated from 1982–1985 In two local cassava cultivars in Cameroon. Unweeded plots had more than 90% losses and were infested by birds and rodents which caused much damage to the fresh storage roots. One weeding round was not an effective treatment. Two weeding rounds at 4 and 12 weeks after planting (WAP) gave yields twice that with two weedings at 12 and 20 WAP. Three weedings at 4, 12 and 20 WAP gave the best yields: 11 t/ha and 17 t/ha for the red and white‐skinned cultivars, respectively. The highest storage root number was also recorded for the same treatment.
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