Control Efficacy of 45% Propamocarb·Denamidone SC against Potato Late Blight

The effects of different doses of 45% pmpamoearb · fenamidone SC on potato late blight were studied in the paper. The results showed that the overall control effect of 45% propamocarb · fenamidone SC against potato late blight on the 14^th day after the third spraying were 67.64% -83.78%. The yield of potato reached 19 972.5 -23 302.5 kg/hm^2, with higher marketable tuber rate and lower rotten tuber rate. With the increase in fungicide dose, the difference in control effect against late blight was significant, but the yield-increasing effect on potatoes was not significant. The appropriate application dosage of 45% propamecarb · fenamidone SC were 450 -675 g/hm^2.

45%丙环唑悬浮剂对不同小麦品种室内安全性测定

为了探索45%丙环唑悬浮剂对青海省春小麦的安全性,设置45%丙环唑悬0.2、0.4、0.8 mg·g-1的不同处理。结果表明以株高和鲜重抑制率为指标,各品种对药剂的敏感性差异显著;在0.2 mg·g-1剂量下青春38、青春39、通麦1号、阿勃4个品种安全;在丙环唑0.4 mg·g-1剂量下对青春38、青春39、阿勃安全,对通麦1号安全性差;在丙环唑0.8 mg·g-1剂量下对4个品种的安全性都较差。

45%噻呋酰胺·嘧菌酯SC对马铃薯黑痣病的田间防效

[目的]明确45%噻呋酰胺·嘧菌酯SC对马铃薯黑痣病的防治效果,为生产上应用提供理论依据。[方法]采用沟施进行田间药效试验。[结果]45%噻呋酰胺·嘧菌酯SC 202.5g a.i./hm^2的防效最好,植株发病率最低(5.75%),2年的块茎防效分别达到73.53%、74.71%,与嘧菌酯处理没有显著差异;45%噻呋酰胺·嘧菌酯SC 168.75g a.i./hm^2保苗性最好,产量最高,防治效果与25%嘧菌酯SC差异不显著。[结论]45%噻呋酰胺·嘧菌酯SC沟施对马铃薯黑痣病有较好的防治效果,推荐使用剂量168.75~202.5g a.i./hm^2。