Grape Diseases in Illinois in 2003

There was hardly a noticeable evidence of black rot , downy mildew , powdery mildew , or fruit rot (bitter rot, botrytis rot in Illinois vineyards in 2003. Few vines were found infected with downy mildew in a couple of vineyards. The most important problem in vineyards in Illinois continues to be the 2,4-D damage.