【摘要】 为了筛选防治小麦赤霉病的高效药剂,测定了咪鲜胺、戊唑醇、氟环唑、氰烯菌酯、丙硫菌唑、氟唑菌酰羟胺和多菌灵等7种市场主流杀菌剂对小麦赤霉病菌的室内毒力与田间防治效果。结果表明,7种药剂对小麦赤霉病菌的毒力均较强,其中氟唑菌酰羟胺对小麦赤霉病菌的毒力最强,EC₅₀值仅为0.101 0 mg/L;其次是氰烯菌酯、咪鲜胺和多菌灵,对小麦赤霉病菌的EC₅₀值分别为0.371 3、0.586 3和0.627 7 mg/L;丙硫菌唑、戊唑醇和氟环唑对小麦赤霉病菌的EC₅₀值为1.101 6～1.105 9 mg/L。田间人工接种防效试验结果显示,200 g/L氟唑菌酰羟胺SC和25%氰烯菌酯SC对小麦赤霉病的防效最好,显著高于其他药剂,分别为79.31%和77.74%;其次为30%丙硫菌唑OD,防效为72.28%;25%氟环唑SC防效略好于430 g/L戊唑醇SC,而450 g/L咪鲜胺EW和50%多菌灵WP防效较差。更多还原

【Abstract】 In order to control of wheat head blight and provide the basis for scientific prevention and control,toxicity to Fusarium graminearum in vitro and field control effect of seven main fungicides were measured.The results showed that prochloraz,tebuconazole,epoxiconazole,phenamacril,prothioconazole,pydiflumetofen,carbendazim had strong inhibition to F.graminearum.The virulence of pydiflumetofen was the strongest,and the EC₅₀was only 0.101 0 mg/L.The EC₅₀of phenamacril,prochloraz and carbendazim were 0.371 3 mg/L,0.586 3 mg/L and 0.627 7 mg/L,respectively.The EC₅₀of tebuconazole,prothioconazole and epoxiconazole ranged from 1.101 6 to 1.105 9 mg/L.The results of field artificial inoculation revealed that 200 g/L pydiflumetofen and 25%phenamacril showed 79.31%and 77.74%control efficacy against the wheat head blight respectively,which were significantly higher than the other fungicides,followed by 30%prothioconazole,the control effect was 72.28%.The control effect of 25%epoxiconazole slightly better than 430 g/L tebuconazole.However,the control effect of 450 g/L prochloraz and 50%carbendazim were poorer obviously.更多还原