Journal of Phytopathology (2010) 158, 450-452

Haiyan Sun, Hancheng Wang, Gerd Stammler, Jianxia Ma, Jianmei Liu and Mingguo Zhou (2010)
Sensitivity of Chinese isolates of Plasmopara viticola to metalaxyl and dimethomorph
Journal of Phytopathology 158 (6), 450-452
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.
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Link to article at publishers website
Database assignments for author(s): Ming-Guo Zhou

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Plasmopara viticola