SCREENING OF RESISTANT Trichoderma STRAINS AND THE Co-INTERACTION WITH CARBENDAZIM

Five carbendazim resistance strains T21-1～T21-5 were induced by UV-light and selected from Trichoderma spp.,which could grow well in the medium, concentration Carbendazim below 2000mg/L.Through a testing of genetic stability of resistance and antagonism of Botrytis cinerea,an ideal resistant strain T21-4 was screened.with a Co-interaction.the combination of T21-4 agent and Carbendazim was used to control Botrytis cinerea of cucumber,the results showed that the control rote reaches 75.7%,78.9% and 79.5% by treatment of T21-4 and Carbendazim at the ratio of 9∶1,8∶2 and 7∶3,respectively.The control rate is only reaches 70.5% and 71.7%,respectively by applving T21-4 or Carbendazim alone. Adding little Carbendazim to Trichoderma T24 to control crops disease,not only reduceds the activity and infection ability of plant pathogens,but also improved the biocontrol efficiency.