Sensitivity of Wheat Powdery Mildew ( Blumeria graminis f.sp. tritici ) towards Metrafenone

摘要: A monitoring study on the current sensitivity situation of wheat powdery mildew (Blumeria graminis f.sp. tritici) towards metrafenone was performed in 2009 with 2509 isolates. Airborne isolates were randomly collected different regions most important European cereal growing regions. The sensitivities majority comparable to baseline sensitivity, which determined 2000 before market launch compound. Ninety-two showed outside baseline. Eighty-four them classified as moderately adapted and could still be inhibited registered rates glasshouse tests under various preventive or curative conditions. Eight identified resistant, not fully at rates. Resistance management strategies further extensive studies are indicated for a sustainable use against mildew.