The incidence of sweetpotato weevil infestation on sweet potato in relation to frequency of hilling‐up the plant was investigated over two seasons in the Philippines. Planting date had pronounced effect on both damaged marketable and total tubers and the actual yield (weevil‐damaged + non‐weevil‐damaged). Hilling‐up significantly reduced the proportion of both marketable and total (marketable + non‐marketable) weevil‐damaged tubers. Hilling‐up the plants twice, i.e., at 4 and 6 weeks after planting, was adequate to reduce the damage of the weevil to the tuberous roots of sweet potato.