吡唑醚菌酯与氰烯菌酯混用对3种病原菌的抑制效果

Inhibitory Effects of Pyrazolstroxide and Cyenstroxide on 3 Pathogens

用Wadley法评价吡唑醚菌酯和氰烯菌酯混配对3种重要的植物真菌病原菌厚垣镰刀菌、烟草疫霉菌和立枯丝核菌的抑制效果。结果表明:2种药剂混用对3种病原菌的抑制均无拮抗作用,混配对厚垣镰刀菌和烟草疫霉菌的抑制效果表现出相同的规律,除吡唑醚菌酯和氰烯菌酯为3∶1表现为加成外,其他配比从2∶1到1∶3都表现为增效作用,且增效程度与氰烯菌酯比例增大成正相关;对立枯丝核菌,除吡唑醚菌酯:氰烯菌酯3∶1配比表现为加成外,其他配比均为增效,其中2∶1配比增效最为显著。

In this study,the inhibitory effect of the mixture of Pyraclostrobin and Phenamacril on 3 important plant fungal pathogens,Fusarium chlamydosporum,Phytophthora nicotianae and Rhizoctonia solani were evaluated by the Wadley method.The results showed that the mixture of 2 agents had no antagonistic effect on the 3pathogens.The mixture inhibitory effect on F.chlamydosporum and P.nicotianae showed the same trend that except for the addition of 3∶1 ratio of Pyraclostrobin and Phenamacril,other ratios from 2∶1 to 1∶3 all showed synergistic effect,and the synergistic degree was positively correlated with the increase of Phenamacril ratio.For R.solani,excetp for the ratio of 3∶1 of pyrazolstroxide to Phenamacril,the mixture effect of the other ratios was synergistic,among which 2∶1 ratio was the most significant synergistic.