Abstract:By analyzing and comparing the results of controlling Dendrolimus houi Lajonquiere,one of the key damagers to Cupressus funebris Endl.by eating its leaves,by ridding their cocoon,controlling with chemical pesticides:Omethoate,Suniao No.1/chlorbenzuron,with biopesticide:Beauveria bassiana,and with the mixture of Suniao No.1/chlorbenzuron and Beauveria bassiana,the authors can come up with a conclusion that the mixture of Suniao No.1/chlorbenzuron and Beauveria bassiana can stop the Dendrolimus houi Lajonquiere's damage to Cupressus funebris Endl.effectively and quickly for long time,especially to the pests before 3 instars.