Tag Archives: invasive diseases

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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Current Status of Citrus Greening in Florida

Here’s the latest on attempts to deal with citrus greening (huanglongbing) in Florida from TheLedger.com at http://www.theledger.com/article/20120410/NEWS/120419953?Title=Scientist-Remedy-for-Citrus-Greening-Disease-Fails-to-Improve-Productivity). The most troubling bit of news in the article is that University of Florida plant pathologist Jim Graham “cited research by U.S. Sugar, also … Continue reading

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Huanglongbing Found in Texas

The Texas Department of Agriculture and USDA APHIS announced this week that huanglongbing (citrus greening) has been confirmed in a citrus grove in Hidalgo County, Texas.  A portion of that county has been placed under an emergency quarantine order and … Continue reading

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A New Boxwood Blight in the U.S.

As if boxwoods didn’t have enough problems already with diseases caused by Phytophthora and Volutella, a new boxwood blight, caused by the soilborne fungus Cylindrocladium pseudonaviculatum (= Cylindrocladium buxicola), was confirmed on nursery plants in North Carolina last month. It was subsequently found in a nursery in … Continue reading

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Sweet Orange Scab (Update Oct. 11)

Sweet orange scab has now been confirmed on citrus (leaves and fruit) from 15 parishes across southern Louisiana and four counties in Texas including two in the Rio Grande Valley, the main citrus producing area of Texas. The widespread occurrence of the … Continue reading

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Sweet Orange Scab in Louisiana – Update (August 30)

Sweet orange scab has now been confirmed in a citrus grove in Calcasieu Parish.

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