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The pathogen resistant to triadimefon was major cause of failure to control rubber powdery mildew in Hekou during 1998～2000. Main reason to bring resistant and the countermeasure were discussed.
The pathogen resistant to triadimefon was major cause of failure to control rubber powdery mildew in Hekou during 1998 ~ 2000. Main reason to bring resistant and the countermeasure were discussed.