As of spring 2011, growers in eastern Washington have several new fungicides at their disposal for managing powdery mildew. For cherry growers, new products include Adament ­(tebuconazole + trifloxystrobin), Quash (metconazole), and Unicorn (tebuconazole + sulfur). Four new materials are available for grape growers: Adament, Inspire Super ­(difenoconazole + cyprodinil), Unicorn, and Vivando (metrafenone). Adament and Inspire Super, along with the existing products Flint (trifloxystrobin) and ­Pristine ­(pyraclostrobin + boscalid), ­provide the added benefit of also controlling Botrytis bunch rot, when applied at proper rates. Bunch rot was a problem in many eastern Washington vineyards last year. The accompanying fungicide […]