| 摘要 |
PROBLEM TO BE SOLVED: To obtain a plant disease controlling agent capable of suppressing occurrence of powdery mildew and growth of gray mold, etc., which is other important plant disease by using a microorganism of the genus Alcaligenes as an active ingredient. SOLUTION: This plant disease controlling agent contains Alkaligenese faecalis belonging the genus Alkaligenese and separated from soil in Kanagawa prefecture or cultured product of its genetic variant as an active ingredient. Alkaligenese faecalis No.4 (FERM P-15229) is preferably used as Alkaligenese faecalis. The genetic variant is obtained by subjecting the Alkaligenese faecalis No.4 as an original strain to natural or induced mutation. The variant is improved in performance, compared with No.4 strain. The cultured microorganism cell can also directly used without separating from the cultured products. The cell can also be used as water dispersible powder, etc. A microbial suspension obtained by controlling the microbial concentration to >=1×10<7> /ml concentration is preferably used as the spraying concentration. |
