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Powdery mildew on New Guinea impatiens


February 11, 2014
By Dr. Nora Catlin Floriculture Specialist Cornell Cooperative Extension

Feb. 11, 2014 — If you are in an area hard hit by impatiens downy
mildew, you likely have more New Guinea impatiens on your benches than a
couple of years ago.

Feb. 11, 2014 — If you are in an area hard hit by impatiens downy mildew, you likely have more New Guinea impatiens on your benches than a couple of years ago.

There are a few pests and diseases you already know to look for on  this crop, broad mite and Impatiens necrotic spot virus (INSV) for example. Powdery mildew is not a disease that  has typically been a large concern for New Guinea impatiens crops, however  we have been seeing it with more frequency over the past couple of seasons and we're currently hearing reports of it in greenhouses.

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