In the sweet potato cultivation of the Nansei Islands, the occurrence of pests and diseases have become a problem. Among them, sweet potato weevil and potato weevils produce a greater harm to the sweet potato tuberous root. In addition, by the Plant Protection Law, the movement of harmful insect is restricted. This Group is working on the development of damage reduction technology through labor-saving and less environmental risks, and provides effective biological materials to these weevil pest control and chemical agents.
