T.O. Ezulike, S.C. Anioke and S.O. Odurukwe
Two sweet potato varieties (tolerant and susceptible to Cylas puncticollis (Boh) were each combined with three other control measures (time of planting, earthing up and dipping vine cuttings in insecticide) and laid out in a randomized complete block design. Cylas sp. infested both the sweetpotato vines and tubers at varying degrees. Severity of damage was higher on susceptible sweet potato variety by 68%. The tolerant variety produced more tubers than the susceptible variety. Sweet potato planted early (June) in the cropping season produced more tubers than the that planted later (July) in the season. The interactions were not significant. Mean tuber yields of tolerant variety were higher than that of susceptible variety. Sweetpotato planted early in the cropping season had higher tuber yield than that planted later in the season. The interactions were also not significant. The use of tolerant sweet potato variety and early planting played major role in the control of Cylas sp. And this package must be incorporated in any IPM strategy against the pest.