Pesticide Effects of Baktop Capsules on Termite Control

Experiments of using Baktop capsules to control termite were made in Yuhang of Zhejiang Province from 1997 to 2003. The contact poisoning effects of 5 different dosages(62.5,125,250,500,1 000 mg·kg-1) were all 100%,and the mortality of the least dosage,62.5 mg·kg-1,was also 100% after 3 days. The expellable effect and the wood resistance to termite were very excellent though termite could pass through a short distance in the poisonous soil treated by the least dosage,62.5 mg·kg-1. The results of field soil treatment test showed that control effect of the poisonous soil treated by 250～1 000 mg·kg-1 Baktop to termite was positively correlated with the dosages of pesticide.The control effect of 1 000 mg·kg-1 was 100% after 5 years,and 80% after 6 years.The results also showed that efflorescence had no effect on the control effect of Baktop.The control effect of Baktop capsules to Reticulitermes speratus was better than that of to Coptotermes formosanus.