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Powdery mildew is a fungal disease that affects plant leaves, pods, and stems. This problem looks alot like whitish spots that spread. They eventually look like white splotches with black speckles. This disease can reduce the yield of your prize plants. Mildew likes warm days, cool nights, and lots of humidity or rainfall. Infected seeds will look slightly hairy, kind of like a furry brown patch or something on it. It also overwinters on plant debris.
Controls include: Fall cleanup. Avoid planting in heavy shade. Proper fertilization. Proper irrigation. Deep and infrequent is best and water in the mornings. Plant early. Fall crops seem to be more susceptible. Do not plant again in soil infested with mildew until you are able to solarize the soil to kill the fungus or use organic fungicides to treat soil AND the plants in it. This will also help alleviate any overwintering if you kill it on the plants that are coming out of the ground as well. UPDATE: Please read the following article about mildew on cucumbers. Very interesting. http--147.46.94.112-journal-sej-full-c12_199908_180801.pdf
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The copyright of the article Powdery Mildew in Garden Pests is owned by Carla Goodloe. Permission to republish Powdery Mildew in print or online must be granted by the author in writing.
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