Reagent for preventing and treating tobacco root black rot

The invention discloses a reagent for preventing and treating tobacco root black rot. The reagent is prepared from radix asparagi root extract; the pathogenic bacteria of the black rot of the tobacco roots are Thilaaviopsis bascolica, and the pathogenic bacteria of the black rot of the tobacco roots are Thilaaviopsis bascolica. The reagent contains the radix asparagi root extracting solution, the prevention and treatment of the tobacco root black rot can be realized, the reagent is an all-natural plant extracting solution, the use method is simple, and after the reagent is used, the tobacco has no pesticide residue and no environmental pollution problem. 本申请公开了一种用于防治烟草根黑腐病的试剂，包括：大理天门冬根系提取物；烟草根黑腐病病原菌为基生根串珠霉菌(Thielaviopsis basicola)。该试剂中含大理天门冬根系提取液，可实现对烟草根黑腐病的防治，该试剂为全天然植物提取液，使用方法简单，使用后烟草无农药残留、无环境污染问题。