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- Title
Sensitivity of Chinese Isolates of Plasmopara viticola to Metalaxyl and Dimethomorph.
- Authors
Haiyan Sun; Hancheng Wang; Stammler, Gerd; Jianxia Ma; Jianmei Liu; Mingguo Zhou
- Abstract
During 2007 and 2008, 392 isolates of Plasmopara viticola were collected from 11 regions in seven provinces in China, and their sensitivities to metalaxyl and dimethomorph were determined by the floating leaf disk technique. Among all isolates, 13% were classified as sensitive, 26% as low-level resistant, and 61% as resistant to metalaxyl. Of the 392, 85 were from vineyards never treated with carboxylic acid amide fungicides; these isolates were used to determine the baseline sensitivity to dimethomorph, and their EC50 values ranged from 0.01 to 0.21 (mean ± SD, 0.11 ± 0.04) μg/ml. The other 307 isolates were completely inhibited by a single discriminatory dose of 1.6 μg/ml of dimethomorph.
- Subjects
AGRICULTURAL chemicals; ORGANIC acids; SEED disinfection; TREE diseases &; pests; FUNGI in agriculture; CARBOXYLIC acids
- Publication
Journal of Phytopathology, 2010, Vol 158, Issue 6, p450
- ISSN
0931-1785
- Publication type
Article
- DOI
10.1111/j.1439-0434.2009.01633.x