Evaluation of the Biocontrol Potential of QLP12 against in Eggplant

A fungus with broad spectrum antifungal activity was isolated from the soil in Qinling Mountain， Shaanxi Province， in China. The fungus was identified as based on ITS rDNA gene analysis. The strain， coded as QLP12， showed high inhibition activity on fungal mycelium growth ， especially to ， ， and ， and its potential for biocontrol efficacy of eggplant. wilt disease caused by among 10 fungal species tested was explored. In greenhouse experiments， QLP12 showed an excellent growth-promoting effect on eggplant seed germination (76.7%)， bud growth (79.4%)， chlorophyll content (47.83%)， root activity (182.02%)， and so on. QLP12 can colonize the eggplant interior and also develop in rhizosphere soil. In greenhouse， the incidence of wilt decreased by 83.82% with pretreated QLP12 fermentation broth in the soil. In the field， QLP12 showed prominent biocontrol effects on wilt by reducing the disease index over the whole growth period， a decline of 40.1%. This study showed that the strain QLP12 is not only an effective biocontrol agent for controlling wilt of eggplant， but also a plant growth-promoting fungus that deserves to be further developed.