[Toxicity of different pesticides to Haemadipsa hainana and its control]

Laboratory determination on the toxicity of sumicidin, isoprocarb, dicofol, thiocyclam, dimethoate and glyphosate to Haemadipsa hainana showed that LD50 for the six pesticides followed the order of sumicidin > isoprocarb > dicofol > thiocyclam > dimethoate, but glyphosate was not virulent. "Glyphosate + sumicidin" had much more toxicity. The susceptibility of H. hainana to sumicidin differed in the order of adult > juvenile > subadult. Field tests showed that the control effect of 1.5% sumicidin to H. hainana was 95.08% of total number of its population. Applied tests showed that the control effect of "Glyphosate + 0.5% sumicidin" was 94.7%, and "glyphosate + 1% isoprocarb" was 90.5%. "Glyphosate + pesticides" was more effective both in controlling H. hainana and in destroying its habitat weed.