Triazole Sensitivity in Fusarium graminearum from New York Wheat
In an article in the May issue, Spolti and colleagues describe the discovery in New York of the first tebuconazole-resistant field isolate of Fusarium graminearum reported in the Americas. The isolate was found to have the lowest sensitivity to tebuconazole ever documented for this pathogen, which causes Fusarium head blight (FHB). Following the application of tebuconazole, wheat plants inoculated with this isolate had more severe FHB and higher concentrations of the mycotoxin deoxynivalenol (DON) than plants inoculated with a tebuconazole-sensitive isolate. Moreover, preliminary assessments indicated that the resistant isolate was more competitive in these experiments.