防控马铃薯晚疫病烟雾剂的筛选及田间防控效果分析

Screening of Aerosols Against Phytophthora infestans and their Field Applications

为筛选出对马铃薯晚疫病具有高效防治作用的烟雾剂,采用药剂室内毒力测定和田间药效试验方法,研究了9种烟雾剂防治效果。结果表明烯酰吗啉、氟吗啉、百菌清、醚菌酯、甲霜灵、霜脲氰、霜霉威、乙磷铝对致病疫霉菌丝生长均有较强的抑制作用,EC_(50)分别为0.2961、0.352、0.946、1.2222、2.9068、3.4977、7.2975和10.2649 mg/L;田间药效试验发现烯酰吗啉、氟吗啉重烟雾剂对带菌种薯晚疫病有较好的防效,病株率分别为3.83%和4.83%。研究表明烯酰吗啉和氟吗啉作为烟雾剂的原药,是防治马铃薯晚疫病较好的药剂。

In order to screen better aerosols against Phytophthora infestans . 9 aerosols agents were ested on the toxicity determination in laboratory and field.. The results showed that eight fungicides showed strong bacteriostatic activity against Phytophthora infestans , the ECso value was 0. 2961,0.352, 0. 946, 1. 2222, 2. 9068, 3. 4977, 7. 2975 and 10. 2649 mg/L, respectively. In addition, the di- methomorph, flumorph , chlorothalonil in the aerosol were applied in fields. The dimethomorph and flumorph in the aerosol showed better control effects on seed potatoes with Phytophthora infestans , the rate of diseased plant was 3.83% and 4.83%. The result showed dimethomorph and flumorph in the aerosol were best fungicides against Phytophthora infestans.