Effects of Trichoderma harzianum on Control of Hot Pepper Wilt

The application technology of Trichoderma harzianum affected the efficiency on controlling hot pepper wilt caused by Fusarium oxysporum, the population of the pathogen and the antagonist in rhizosphere, and root weight of the host. The efficiency of root treated by T.harzianum preparation mixed with rice bran (1∶12.5 w/w)and 1∶600× T.harzianum preparation liquor were 80% and 60%; The population amount of T.harzianum in rhizosphere and average root weight of the two treatments and control were 18.60 , 2.41 , 0.28 ×10 6 cfu/g root weight and 0.43 , 0.38 , 0.37 g respectively in pot culture test. Same result were achieved in field experiment of root treated with Trichoderma preparation (1.5 kg/ha) mixed with rice bran.