Control efficiency of Weixianke to sweet potato stem nematode

Biochemical nematicide Weixianke was applied to control sweet potato stem nematode in Qinhuangdao, Hebei Province.The results showed that the average decrement of population of Ditylenchus distructor was 89.44%, average control efficiency on D.distructor was 76.08%, the yield of sweet potato increased 607.25%.The studies indicated that Weixianke possesses the prospect in controlling nematode instead of chemical nematicide.