5种药剂拌种对马铃薯晚疫病的田间防治效果

Field evaluation of seed treatments of five fungicides to potato late blight

为了防治马铃薯晚疫病,以庄薯3号为试验材料,研究5种药剂拌种处理对马铃薯晚疫病的防治效果。结果表明,供试5种药剂拌种对马铃薯出苗期和生长期均无影响。5种药剂拌种对马铃薯晚疫病防治效果有显著差异,其中50%多菌灵可湿性粉剂100 g·667 m^(-2)和稀土旱地宝100 g·667 m^(-2)拌种的防治效果较好,分别达到69.17%和60.34%;25%甲霜灵悬浮剂195 mL·667 m^(-2)、枯草芽孢杆菌14 g·667 m^(-2)和35%甲霜灵拌种剂120 g·667 m^(-2)拌种的防治效果较差,分别为44.17%、34.12%和25.56%。从马铃薯产量测定结果看出,稀土旱地宝100 g·667 m^(-2)拌种增产效果最佳,50%多菌灵可湿性粉剂100 g·667 m^(-2)次之,分别较对照增产42.13%和26.61%。该试验结果可为马铃薯晚疫病的防治提供依据。

In order to control the potato late blight,a field experiment was conducted to determine the effects of five different mixing agents against potato late blight(Phytophthora infestans(Mont.)de Bary)on potato(Zhuangshu 3).The results showed that the various seed treatments did not significantly affect the emergence and growth of the potato.The effects of seed mixing with 5 kinds of agents against potato late blight were significantly different.The 50%carbendazim wettability powder(100 g·667 m^(-2))and rare earth Handibao(100 g·667 m^(-2))showed the greatest control effect of 69.17%and 60.34%respectively,rare earth Handibao(100 g·667 m^(-2))and 50%carbendazim wettability powder(100 g·667 m^(-2))increased the potato yield by 42.13%and 26.61%,respectively,compared with the control.The control effect of 25%metalaxyl suspension concentrate(195 mL·667 m^(-2)),bacillus subtilis(14 g·667 m^(-2))and 35%metalaxyl seed mixing agent(120 g·667 m^(-2))was poor,with only 44.17%,34.12%and 25.56%respectively.This experiment can provide a scientific basis for insect pest management.