马铃薯干腐病室内药剂筛选及防病研究
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摘要：采用生长速率法测定了咯菌腈、苯醚甲环唑、咪鲜胺、戊唑醇、氰烯菌酯和恶霉灵6种杀菌剂对4种马铃薯干腐病菌的室内毒力。结果表明，不同种类镰刀菌对药剂的敏感性存在差异。对4种镰刀菌抑制作用最强的药剂均为咪鲜胺，EC50值范围为0.010～0.057 μg/mL；氰烯菌酯对接骨木镰刀菌菌丝生长无抑制作用；而恶霉灵的抑菌作用普遍较差，EC50值为9.340～64.408 μg/mL；其他4种药剂效果较好。对接菌薯块进行药剂处理可抑制病斑横向扩展及病原菌纵向侵入，但不同杀菌剂防效不同。苯醚甲环唑、咪鲜胺和戊唑醇效果较佳。
关键词：马铃薯干腐病；镰刀菌（Fusarium）；室内毒力；防效
中图分类号：S435.32；S482.2 文献标识码：A 文章编号：0439-8114（2017）17-3268-04
DOI：10.14088/j.cnki.issn0439-8114.2017.17.019
Studies on Screening for Fungicides and Disease Prevention of
Potato Dry Rot in Laboratory
ZHAO Dong-mei， WEI Wei， ZHANG Dai， GU Qing， YANG Zhi-hui， ZHU Jie-hua
（College of Plant Protection， Agricultural University of Hebei， Baoding 071000， Hebei， China）
Abstract： The toxicities of six fungicides including fludioxonil， difenoconazole， prochloraz， tebuconazole， cyanoacrylate and hymexazol against four pathogens were tested by the method of growth rate in laboratory. Results showed that， sensitivities to fungicides of different Fusarium species were different. The toxicity of prochloraz was the strongest and the EC50 value was from 0.010 to 0.057 μg/mL. The cyanoacrylate had no inhibitory effect on F. sambucinum. The inhibitory effect of hymexazol was poor generally and its EC50 value was between 9.340 and 64.408 μg/mL. The inhibitory effect of other four fungicides were better relatively. Potato tubers inoculated with F. sambucinu...
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