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马铃薯晚疫病(Phytothora infestans de Bary)是世界马铃薯生产中最具毁灭性的病害,由于马铃薯晚疫病菌的变异性及其能形成稳定遗传的抗药性,开发新型杀菌剂成为防治马铃薯晚疫病的有效措施。近年来,锰锌.氟吗啉50%可湿性粉剂作为新型杀菌剂对卵菌纲真菌的防治效果突出。为验证该药剂对马铃薯晚疫病的防治效果,本文在黑龙江省马铃薯主产区内随机选择了3个试验点,并于2008年和2009年连续2年进行了该药剂对马铃薯晚疫病的防效研究,结果表明:在各供试处理中,锰锌.氟吗啉50%可湿性粉剂(3次,1 125ga.i./hm2)对马铃薯晚疫病具有很好的防治效果(平均防效>85%),锰锌·氟吗啉50%可湿性粉剂(3次,750ga.i./hm2)和霜脲.锰锌72%可湿性粉剂(3次,1 080ga.i./hm2)的防效相当(平均防效均在80%左右),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,锰锌·氟吗啉50%可湿性粉剂(3次,1 125g 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%。这表明,锰锌·氟吗啉50%可湿性粉剂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。
Phytothora infestans de Bary is the most devastating disease in world potato production and development of a new fungicide becomes effective against potato blight due to the variability in P. infestans and its ability to form stable genetic resistance Measures. In recent years, manganese and zinc. Flumorph 50% WP as a new fungicide on the oomycete fungus control effect is outstanding. In order to verify the control effect of the pesticide against potato late blight, three test points were randomly selected in the main potato producing areas in Heilongjiang Province. The control effect of the pesticide against potato late blight was tested in 2008 and 2009 for two consecutive years The results showed that 50% WP (3 times, 1 125ga.i./hm2) had good control effect on potato late blight (average control effect> 85%), 50% wettable powder of manganese zinc and flumorph (3 times 750 g.i./hm2), and cream urea.Minzinc 72% wettable powder (3 times, 1080 g.i./hm2) The control effect was equivalent (the average control effect was about 80%), and also showed a better control effect against late blight. Moreover, the treatments of all the tested agents could increase the yield of potato and the 50% wettability of Mn-Zn-Fm The yield of powder (3 times, 1 125g ai / hm2) was the highest, with an average rate of increase of 19.51% in 2008 and an average rate of 21.08% in 2009. This indicates that the 50% wettable powder of manganese, zinc and flumorph not only has a good control effect on late blight of potato, but also can ensure the stable yield of potato and increase yield.