6种杀菌剂对马铃薯早疫病菌的室内毒力测定
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S435.32

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农业部现代马铃薯产业技术体系建设专项资金资助项目(CARS-09-P18);国家重点研发计划项目(2018YFD0200806)


Indoor Toxicity Determination of Six Fungicides to Alternaria Solani
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    摘要:

    采用组织分离法对采自河北省、内蒙古和黑龙江省的马铃薯早疫病叶片进行分离,通过观察孢子形态确定得到菌株为茄链格孢(Alternaria solani)。为了筛选出能够高效防治马铃薯早疫病的杀菌剂,采用菌丝生长速率法测定6种杀菌剂对不同地区马铃薯早疫病菌的室内毒力。结果表明:6种药剂中抑菌效果较好的是80%代森锰锌WP和30%霜脲氰WG,EC50值范围分别为4.20~10.77 mg/L和3.02~17.45 mg/L;抑菌效果最差的药剂是72%百菌清SC,EC50值范围为550.91~1 888.40 mg/L。供试药剂对不同地区菌株间的毒力存在一定差异,针对不同地区菌株筛选毒力较强的药剂,对河北省围场地区菌株毒力较强的药剂为80%代森锰锌WP和30%霜脲氰WG;内蒙古地区为80%代森锰锌WP和30%霜脲氰WG;黑龙江省齐齐哈尔地区为80%代森锰锌WP和25%嘧菌酯SC。

    Abstract:

    Potato early blight leaves collected from Hebei, Inner Mongolia and Heilongjiang were separated by tis-sue separation. The strain was identified as Alternaria solani by spore morphology. In order to screen the fungicidesthat can effectively control potato early blight in different regions, the indoor toxicity of six fungicides to A. solani was determined by mycelial growth rate method. The results showed that among the six agents, 80% mancozeb WPand 30% cymoxanil WG had better antibacterial effect, and the EC50 values were 4.20-10.77 mg/L and 3.02-17.45 mg/L, respectively. 72% chlorothalonil SC was the worst fungicide with EC50 ranged from 550.91-1 888.40 mg/L.The virulence of the tested fungicides to the strains from different areas was different, and the more virulent fungi-cides were screened according to the strains from different areas. The results showed that 80% mancozeb WP and 30% cymoxanil WG were more virulent to the strains in Weichang area of Hebei Province; 80% mancozeb WP and 30% cymoxanil WG were more virulent to the strains in Inner Mongolia area; 80% mancozeb WP and 25% azoxys-trobin SC were more virulent to the strains in Qiqihaer area of Heilongjiang Province.

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范莎莎,赵冬梅,杨爽,杨志辉,朱杰华.6种杀菌剂对马铃薯早疫病菌的室内毒力测定[J].东北农业科学,2021,46(1):75-79.

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  • 收稿日期:2019-01-07
  • 在线发布日期: 2024-11-25
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