Effect of soil treatment on colonization and biocontrol efficiency of Trichoderma

Trichoderma that was applied to the continuous cropping soil had been improved and disinfected was studied.The results showed that Trichoderma could survive and reproduce on the rhizophere and on the root surface.At the same time Trichoderma had no harmful effects on other beneficial microorganisms. After disinfected by high temperature,the soil microorganisms were in a state of vacuum.The vacuum state was helpful to rapid reproduction of Trichoderma,and could improve the growth of the melons and reduce the disease index of muskmelon fusarium wilt.The disease incidence of muskmelon fusarium wilt showed positive relationship with the number of Fusarium spores that survived in the soil,and showed negative relationship with the amount of Trichoderma and bacteria in the soil.