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通过在室内测定687.5g/L氟吡菌胺.霜霉威悬浮剂对马铃薯晚疫病菌的菌丝抑制作用、在田间对马铃薯晚疫病的防效及对马铃薯的安全性试验。结果表明:687.5g/L氟吡菌胺.霜霉威悬浮剂对马铃薯晚疫病的菌丝有较强的抑制作用,抑制中浓度(EC50)为0.4549mg/L,亚致死剂量(EC95)为1.6425mg/L,喷雾800倍液和1000倍液对马铃薯晚疫病的防效分别为80.66%和75.32%,对马铃薯喷雾600倍液和500倍液,药后3d、7d和14d马铃薯生长正常,无药害。
The inhibitory effect of 687.5g / L fluopicolide on the mycelium of potato late blight fungus was tested in the laboratory, the control effect on potato late blight and the safety test on the potato in the field. The results showed that 687.5g / L fluopicolide and propamocarb suspension had strong inhibitory effect on the mycelium of potato late blight, the EC50 was 0.4549mg / L and the sublethal dose (EC95) was The control effects of 1.6425mg / L, 800 times spraying and 1000 times spraying on potato late blight were 80.66% and 75.32% respectively. The potato was sprayed with 600 times and 500 times of liquid, the growth of potatoes was normal at 3d, 7d and 14d after treatment, No injury.