摘要
采用生长速率法测定16种杀菌剂单剂药效并筛出对番茄晚疫病增效作用较好的混剂配比。结果表明氰霜唑、咯菌腈、氨基寡糖素、吡唑醚菌酯、烯酰吗啉的EC50值分别为0.21、0.37、0.46、0.65、0.74mg/L,抑菌效果均较好。将氰霜唑分别于其他四种杀菌剂复配,其中咯菌腈和氰霜唑以质量比为1∶1混配时,EC50值为0.08mg/L,增效系数为3.38,增效作用明显。在温室防效试验中,采用常规喷雾法,质量分数为40%咯菌腈·氰霜唑在100g.a.i/hm2剂量下防效最好,达到93.66%,可为农业生产提供有效的科学理论指导。
The study aims to test sixteen effective fungicides and screens out the proportioning ratio for controlling on phytophthora infestans through indoor screening.The results showed that the EC50 value of cyazofamid、fludioxonil,chitosam-oligosacchrins,pyrazole kresoxim,dimethomorph were 0.21,0.37,0.46, 0.65,0.74mg/L,had obviously inhibitory activity.The mixture of fludioxonil and cyazofamid is the most obvious synergism at the ratio of 1：1 with EC50 value of 3.38,exhibiting obvious synergic effect.The greenhouse efficacy of the mixture at 100g.a.i/hm2 was best against phytophthora infestans with the method of greenhouse was spraying,which laid a foundation for better controlling phytophthora infestans.
基金
长春市国际科技合作计划(13GH06)
关键词
番茄晚疫病
杀菌剂
毒力测定
phytophthora infestans
fungicide
toxicity test
