Xu Congying, Liang Xiaoyu, Hou Yiping, Zhou Mingguo
College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Pesticide, Nanjing 210095, China.
Plant Dis. 2015 Jul;99(7):969-975. doi: 10.1094/PDIS-09-14-0983-RE. Epub 2015 May 15.
We determined the effects and efficacy of benzothiostrobin, a new strobilurin-derived fungicide, against the plant-pathogenic fungus Sclerotinia sclerotiorum (the causal agent of Sclerotinia stem rot). Mycelial growth and sclerotial germination in vitro were strongly inhibited by benzothiostrobin in the presence of salicylhydroxamic acid. On detached rapeseed leaves, benzothiostrobin at 40 μg/ml reduced lesion development by 87%. No cross-resistance was detected between benzothiostrobin and carbendazim, iprodione, fludioxonil, or boscalid. A formulated mixture of benzothiostrobin and fluazinam at 1:1 had synergistic activity against S. sclerotiorum in vitro. In field trials, benzothiostrobin alone or formulated with fluazinam at 1:1 (150 g a.i. ha) was significantly (P < 0.05) superior to iprodione in controlling Sclerotinia stem rot of rapeseed. These results suggest that benzothiostrobin has substantial potential for the control of Sclerotinia stem rot.
我们测定了新型甲氧基丙烯酸酯类杀菌剂苯并噻菌酯对植物病原真菌核盘菌（油菜菌核病的致病因子）的作用和效果。在水杨羟肟酸存在的情况下，苯并噻菌酯强烈抑制核盘菌的菌丝生长和菌核萌发。在离体油菜叶片上，40μg/ml的苯并噻菌酯使病斑扩展减少了87%。未检测到苯并噻菌酯与多菌灵、异菌脲、咯菌腈或啶酰菌胺之间存在交互抗性。苯并噻菌酯与氟唑菌酰胺按1:1配制的混合物在体外对核盘菌具有协同活性。在田间试验中，单独使用苯并噻菌酯或与氟唑菌酰胺按1:1（150g有效成分/公顷）配制，在防治油菜菌核病方面显著（P<0.05）优于异菌脲。这些结果表明，苯并噻菌酯在防治油菜菌核病方面具有巨大潜力。
