… Irrigation Sweetpotato yields in Hawai'i can be increased by 30 percent with timely
irrigation. Generally, sweetpotato requires less water than most other vegetables. Irrigate
moderately to improve stand establishment soon after planting. Maintain a constant water
supply especially during the tuber formation stage at 7 to 9 weeks after planting. … Insect
pests which most often reduce marketable sweetpotato yields in Hawai'i include: the
sweetpotato weevil, the gulf wireworm, the sweetpotato flea beetle, and the sweetpotato …