Sweet Potato Weevil Quality Sweet Potatoes Sweet Potato Weevil Damage

• Insecticide applications typically raise the yield of marketable sweet potatoes by 50 % or more • Sweet potato weevil tunnels are filled with excrement; badly-infested tubers have a very bitter taste • Sweet potatoes must be free of insect damage to qualify for a US No 1 grade • Sweet potatoes severely-damaged by white grubs often have almost half of the surface area eaten awa