Because powdery mildew does not significantly affect the health of most plants, treatment is seldom necessary or practical in the home garden. Many gardeners learn to live with the appearance of ...

Powdery mildew is a fungal disease affecting many plants, causing a white or gray coating on leaves and slowing growth. The fungus thrives in warm, dry weather with high humidity, especially in ...

SAN RAMON, Calif., – Sept. 14, 2020 – Apple growers now have a new defense against powdery mildew, apple scab and rust diseases with the EPA registration of Excalia™ Fungicide from Valent U.S.A. With ...

Question: Some of my trees are losing leaves. I thought with the plentiful rains we have had that the trees would be doing fine and there shouldn't be any leaves falling off, but my crabapple is ...

Q: Last year my grapes had such bad powdery mildew that even the grapes dried up and looked moldy and shriveled. I was told by the master gardeners at the farmer’s market that I needed to do something ...