氟吗啉·锰锌50%WP防治马铃薯晚疫病研究

Study on Control of Phytothora infestans by 50% WP Flumorph-Mn-Zn

[目的]验证氟吗啉.锰锌50%WP对黑龙江省马铃薯晚疫病的防治效果。[方法]在黑龙江省马铃薯主产区内随机选择3个试验点,于2008和2009年连续2年进行氟吗啉.锰锌50%WP对马铃薯晚疫病的田间药效研究。[结果]在各供试处理中,氟吗啉.锰锌50%WP(3次,1125 g a.i./hm2)对马铃薯晚疫病具有很好的防治效果(平均防效>80%),氟吗啉.锰锌50%WP(3次,750 g a.i./hm2)和霜脲.锰锌72%WP(3次,1 080 g a.i./hm2)的防效相当(平均防效均>75%),也表现出对抗晚疫病有较好的防治作用;并且各供试药剂处理均能提高马铃薯产量,氟吗啉.锰锌50%WP(3次,1125 g a.i./hm2)的增产率最高,2008年平均增产率为19.51%,2009年平均增产率为21.08%。[结论]氟吗啉.锰锌50%WP不仅对马铃薯晚疫病有较好的防治效果,还可以保证马铃薯稳产、增产。

[Objective] The study aimed to verify the control effect of 50% flumorph-Mn-Zn WP against Phytothora infestans in Heilongjiang Provence.[Method] 3 experimental sites were randomly selected in the potato production area in Heilongjiang Province and the field efficacy researches on the control of 50% flumorph-Mn-Zn WP against P.infestans were conducted in 2008 and 2009.[Result] Among tested treatments,50% flumorph-Mn-Zn WP at 1 125 g a.i./hm2 with 3 application times showed a very good control effect on P.infestans,with the mean controlling rate of more than 80%;50% flumorph-Mn-Zn WP at 750 g a.i./hm2 with 3 times had mean controlling rate of more than 75%,being quite to the control effect of 72% frost urea-manganese zinc WP at 1 080 g a.i./hm2 with 3 times,which showed a better control action against P.infestans.Each tested treatment all could increase the potato yield,in which,the treatment of 50% flumorph-Mn-Zn WP at 1 125 g a.i./hm2 with 3 times showed highest yield-increasing rate,with the mean yield-increasing rate of 19.51% in 2008 and that of 21.08% in 2009.[Conclusion] 50% flumorph-Mn-Zn WP not only had better control effect on P.infestans,but also ensured the stable yield and increased yield of the potato.