[Apple-Crop] powdery mildew

[David Doud]

Powdery mildew has historically been a minor problem here, but this year there was unacceptable levels of infection, particularly on Goldrush and in the Vf block where the spring sees a much reduced amount of fungicides. I am wondering about any control measures I could use this fall to reduce inoculum and also about integrating sulphur into the early season control program. I am uncomfortable in that I am using some of this high powered new chemistry for sooty blotch and fly speck control in the summer and worry about applying it to trees full of PM - it would seem a recipe for creating resistant strains.  

David Doud
grower, IN