论文信息 - Sensitivity of Chinese Isolates of Plasmopara viticola to Metalaxyl and Dimethomorph

Sensitivity of Chinese Isolates of Plasmopara viticola to Metalaxyl and Dimethomorph

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 EC 50 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.

[1] A. Keinath. Sensitivity of Populations of Phytophthora capsici from South Carolina to Mefenoxam, Dimethomorph, Zoxamide, and Cymoxanil. , 2007, Plant disease.

[2] N. Kraus,et al. Inheritance of resistance to carboxylic acid amide (CAA) fungicides in Plasmopara viticola , 2007 .

[3] P. Fourie. Metalaxyl Sensitivity Status of Downy Mildew Populations in Western Cape Vineyards , 2017 .

[4] W. Kirk,et al. The Generation and Quantification of Resistance to Dimethomorph in Phytophthora infestans. , 2004, Plant disease.

[5] T. Staub,et al. Cross-resistance in Phytophthora infestans and Plasmopara viticola against different phenylamides and unrelated fungicides , 1987 .