木霉菌剂与重茬净复配防治平贝黑腐病及对平贝诱导抗性

Control Effect of Combination of Trichoderma virens T43 and Soil Improvement Agent to Black Rot of Fritillaria ussuriensis and Its Induced Resistance to F ritillaria ussuriensis

平贝黑腐病是平贝栽培中最重要的病害,本文采用微生物学和植物生理学研究方法,将生防菌绿木霉T43与土壤改良剂重茬净复配使用,探讨其对平贝黑腐病的防治效果及对平贝的诱导抗性。结果表明:1木霉菌+重茬净组合可有效控制病害发生,对平贝黑腐病的相对防治效果达到69.94%;2生物菌剂的复配使用可有效改良平贝连作土中微生物群落结构,改变病原菌占主导地位的格局,增加细菌和放线菌生物量,使土壤微生态系统保持稳定。

Black rot is the most important disease for Fritillaria ussuriensis. In this paper,the microbiology and plant physiology methods were adapted to study the control effect of combination of Trichoderma virens T43 and soil improvement agent to black rot of Fritillaria ussuriensis and its induced resistance to F. ussuriensis. The result showed that： 1） T. virens T43 and soil improvement agent can control black rot effectively,and the relative control effect was 69. 94%. 2） T. virens T43 and soil improvement agent can restore the microbial community composition of F. ussuriensis replant soil,increase the biomass of bacteria and actinomycetes,and make the soil microecosystem become stable.