利用药剂组合处理防治马铃薯晚疫病

Control of Potato Late Blight by Combination of Different Fungicides

摘要: 马铃薯晚疫病严重影响马铃薯生产和危害粮食安全。为了防止马铃薯晚疫病，设置了以清水为对照，三种药剂组合处理种植马铃薯的田间试验。结果表明，对照的最终发病率接近90%，而药剂组合处理的最终发病率只在11%~20%之间，证明药剂组合处理能显著降低马铃薯晚疫病的发病率。药剂组合对马铃薯晚疫病最终防治效果在77%~88%之间，以B处理(双炔酰菌胺 + 唑酮氟噻唑吡乙酮 + 霜脲锰锌)的防治效果最佳。对照的发病率与生长时间呈极显著的指数相关，而药剂组合处理的发病率与生长时间的最高相关类型为二次函数，说明药剂组合不仅对马铃薯晚疫病具有明显的防治效果，而且也改变了发病率与生长时间的关系。

Abstract: Potato late blight seriously affects potato production and endangers food security. In order to prevent potato late blight, a field experiment was conducted to plant potato with water control and three fungicide combinations. The results showed that the final incidence rate in control was close to 90%, while the final incidence rates in fungicide combination treatments were only between 11% and 20%, and these proved that the fungicide combination treatment could significantly reduce the incidence rate of potato late blight. The final control effects of fungicide combinations on potato late blight were between 77% and 88%, and the control effect of treatment B (mandipropamid + Zo-done Fluthiazole Acetylpyrrolidone + frost urea, manganese zinc) was the best. The incidence rate of the control showed a significant exponential correlation with the potato growth time, while the highest correlation between the incidence rate in the combination treatments and the potato growth time were the quadratic function. This indicated that the combination of fungicides not only had significant control effect on potato late blight, but also changed the relationship between the incidence rate and the potato growth time.