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[目的]测定氯啶菌酯与多菌灵对防治草莓白粉病的最佳混配比例。[方法]运用Horsfall法和孙云沛方法测定了氯啶菌酯和多菌灵对草莓白粉病的增效作用。[结果]Horsfall法显示,氯啶菌酯和多菌灵在1∶1-1∶36的范围内都有增效作用,1∶9时增效比最大,C值为1.53;孙云沛方法显示氯啶菌酯与多菌灵1∶9时的EC50值为11.320 mg/L,CTC值达176.95,增效显著。从而确定氯啶菌酯和多菌灵对草莓白粉病的最佳混配比例为1∶9,以该比例为基础,将两者加工成35%氯啶菌酯.多菌灵SC,100 g/hm2时对草莓白粉病的防效为94.67%,高于常规药剂三唑酮、丙环唑、苯醚甲环唑和醚菌酯。[结论]氯啶菌酯和多菌灵混配是防治草莓白粉病的良好配方。
[Objective] The aim of the study was to determine the best mixing ratio of trimebutazone and carbendazim to control strawberry powdery mildew. [Method] The synergistic effects of trifloxystrobin and carbendazim on strawberry powdery mildew were determined by Horsfall method and Sun Yunpei method. [Result] Horsfall method showed that both chlorothalonil and carbendazim had synergism in the range of 1: 1 to 1:36, the synergistic ratio was the highest at 1: 9, and the C value was 1.53. The method of Sun Yunpei showed that chlorine The EC50 value of DBT and carbendazim at 1: 9 was 11.320 mg / L, the CTC value was 176.95, and the synergism was significant. Thus, the best mixture ratio of clonicamid and carbendazim to strawberry powdery mildew was determined to be 1: 9, on the basis of which the two were processed into 35% chlorothalonil, carbendazim SC, 100 g / hm2 on strawberry powdery mildew control effect was 94.67%, higher than the conventional triadimefon, propiconazole, difenoconazole and kresoxim-methyl. [Conclusion] Mixing of chlorothalonil and carbendazim was a good formula to control strawberry powdery mildew.