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The crape myrtle is a fast growing tree that can be affected by mildew and aphids.
Ampelomyces quisqualis is a mycoparasite of powdery mildews. It overwinters or survives in the absence of a suitable host as pycnidia. Raindrops cause conidia to be expelled from ripe pycnidia and these may splash onto nearby powdery mildew. Infection is favoured by humid conditions and temperatures in the range 20 to 30 °C (68 to 86 °F) and ...
Crepe myrtles are for the most part trouble-free. But insects, cool nights, and too much shade can cause problems. If your tree didn't bloom or you've spotted mold, here's what you can do.
Pyrazophos is a systemic fungicide which is used in orchards, vineyards and vegetable crops against powdery mildew. In some instances, the compound is also an effective insecticide (e.g. against leaf-miner flies). [3]
Fluopyram is a fungicide and nematicide used in agriculture. [2] [3] It is used to control fungal diseases such as gray mold (Botrytis cinerea), powdery mildew, apple scab, Alternaria, Sclerotinia, and Monilinia. It is an inhibitor of succinate dehydrogenase (SDHI fungicide). [4]
That’s powdery mildew, a fungus that affects a wide range of fruits, vegetables and flowers, coating their leaves, stems, blossoms and, in severe cases, entire plants. It isn’t pretty.