Tag Archives: downy mildew

Cucurbit Downy Mildew 2012

We have yet to see downy mildew on cucurbits here in Louisiana this year, but it was recently reported on cucumbers in Baldwin County, Alabama, which is east of Mobile Bay. Growers, especially those growing watermelons and pumpkins, and county … Continue reading

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Impatiens Downy Mildew Update

Downy mildew was observed on Impatiens walleriana in a residential landscape in New Orleans today. The affected plants had been purchased at a “big box” store in the area, but it was not the same chain as the store in the … Continue reading

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Impatiens Downy Mildew Makes Its First Confirmed Appearance in the Louisiana Landscape

We had our first confirmed report of downy mildew on Impatiens walleriana here is south Louisiana this weekend. My wife commented that one of the double impatiens that she’d gotten at one of the big box stores a couple of weeks … Continue reading

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New Oomycete-specific Fungicide from Syngenta

Micora™, a new fungicide from Syngenta, is now registered for use on greenhouse and outdoor ornamentals and vegetable transplants to be sold to retail consumers. Micora™ contains the active ingredient mandipropamid (a carboxylic acid amide), which is specific for the … Continue reading

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Rose Downy Mildew Is Active in Louisiana

Received a call from a local garden center last week regarding downy mildew on a shipment of roses from California that they had hoped to sell for Mother’s Day. Symptoms on the somewhat resistant cultivar Mr. Lincoln could easily be mistaken for … Continue reading

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Cucurbit Downy Mildew Update!!

A colleague in South Carolina recently reported that downy mildew had been observed on yellow summer squash and zucchini plants in a Home Depot in Charleston last week (April 6). The plants had been grown in Miami, FL and had Home … Continue reading

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Cucurbit Downy Mildew Update (August 12)

I have not yet had any reports of cucurbit downy mildew (CDM) in Louisiana, but it’s probably only a matter of time as it has been reported recently in east Texas and south-central Alabama. Fall plantings of cucumbers and squash may … Continue reading

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