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Grape - Powdery mildew ROP

Roots of Peace: Kenneth R. Tourjee Powdery Mildew in the Vineyard The four most widely recognized classes of plant pathogens are bacteria, fungi, nematodes and viruses. Grape powdery mildew (PM) is caused by the fungus Uncinular necator. This fungus originated in Eastern North America, although it is now found worldwide. In many regions it is the causal agent of the most economically damaging disease to grapes.....

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