Pioneer chemical product Pencycuron is a novel fungicide of phenylurea type. The fungicide spectrum of pencycuron in vitro showed that the com pound had specific antibiotic activity to Rhizo-ctonia solani, particularly to Pellicularia Sasakii . Pencycuron also displa-yed a strong inhibitory effect on the P sasakii mycelial development on agar plate amended with the compound at low concentrations, and induced its morphological disorder in mycelial development. The effect property is almost the same as that of Validamycin.
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