COMPOSITION FOR CONTROLLING PLANT DISEASES WHICH COMPRISES LIGNAN COMPOUNDS, RESORCINOL COMPOUNDS OR NUTMEG EXTRACT AND METHOD FOR CONTROLLING PLANT DISEASE USING SAME

摘要

A composition comprising lignan-based compounds, resorcinol-based compounds or the extract of nutmeg(Myristica fragrans Houtt.) containing them is provided to control plant diseases including rice blast disease, tomato late blight, leaf rust, barley powdery mildew and anthracnose without harmful effect on human and environmental pollution. A composition for controlling plant diseases comprises 100 to 1000 mug/ml of lignan-based compounds represented by the formula(1) in which R1 and R2 are each independently OCH2O, OMe or C, nectandrin-B represented by the formula(2), or resorcinol compounds represented by the formula(3) in which R1 and R2 are each independently H or OH, or 100 to 3,000 mug/ml of the extract of nutmeg(Myristica fragrans Houtt.) containing them which is prepared by extracting nutmeg(Myristica fragrans Houtt.) with an organic solvent selected from methanol, ethanol, hexane, ethylacetate, acetone or methylene chloride, wherein the composition is applicable directly to crops or soil.