Powdery mildew on an apple tree. (Martha Proctor/Marin Master Gardeners) If these practices fail to prevent disease, an application of fungicide may be necessary. A protectant fungicide prevents ...

Apples are susceptible to a whole bucket of diseases like powdery mildew, apple scab and anthracnose. Reputable nurseries should be able to give advice on varieties that are resistant to scab or ...

Jillian Patrie | University of Minnesota Yard and Garden Extension ...

Powdery mildew is unlike many other fungi in that it does not need moist conditions to establish itself and grow after infecting the plant. It just needs several days of temperatures between 60 ...

Wet, humid weather has created ideal conditions for fungal and bacterial diseases, and alert growers know it’s time to scout, clean up, and protect the harvest.