The growth-promoting function and biological control effects of Trichoderma harzianum Th-30 on several vegetables were studied in our experiments.And agronomic characters,traits,theoretical yield and infection ratio of disease in different growth stage were examined.The result suggesting that the treatment of Trichoderma harzianum Th-30 has obvious growth-promoting effect on capsicum and could significantly increase yield of capsicum.It has a good control efficacy of Trichoderma harzianum Th-30 on c...