Inhibitory Effects of 12 Chemical Agents against Alternaria alternata

• 作者: Ai Yongfeng Cui Zhiyan Ji Xiuting Li Bin Shen Hong Song Guanglong Sun Guangjun Wang Xiaoqiang Xu Chuantao Zhang Jiatao Zhang Yongfeng
• 来源期刊: Plant Diseases and Pests(植物病虫害研究:英文版)
• 学科: 经济
• 关键词: Tobacco brown spot Alternaria alternata FUNGICIDE Sensitivity
• 年，卷（期）: 2020,（4）
• 页码范围: 20-23
• 页数: 4页
• 分类号: F42

摘要

[Objective]The paper was to screen highly efficient fungicides for the prevention and control of tobacco brown spot(Alternaria alternata).[Method]The inhibitory effects of 12 chemical agents against A.alternata were determined indoors by mycelium growth rate method.[Result]Toxicity test showed that 30%kresoxim-methyl·boscalid SC had the best inhibitory effect,with an EC_(50)of 1.05μg/mL,followed by 9%pyraclostrobin CS,with an EC_(50)of 2.09μg/mL.As a broad spectrum protective fungicide,77%copper calcium sulfate WP showed a low sensitivity against A.alternata in the petri dish test since it had a mechanism of action different from that of other chemical agents.[Conclusion]The study lays the foundation for subsequent screening of fungicides for the prevention and control of A.alternata in the field.