[Occurrence and control of Cercospora leaf spot on Lonicera macrathoides].

OBJECTIVE: To study the occurrence of Cercospora leaf spot of Lonicera macrathoides and fungicides control method, so as to provide scientific basis for its integrated pests management (IPM). METHOD: The field investigation and the field controlling trial were carried out for the research. RESULT: Cercospora leaf spot was caused by C. rhamni. There was obvious relationship between the damage rate and the altitude, soil organic matter, available K, available P as well as variety. The controlling effect of 10% difenoconazole WG was the highest. 50% Thiram WP, 70% Mancozeb WP also had well controlling effect. CONCLUSION: Cercospora leaf spot of L. macrathoides could be controlled by suitability agricultural and chemical controls.