Tag Archives: Southeast Louisiana Nursery Association

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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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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Disease Du Jour (May 9, 2011)

Received this photo of what appears to be powdery mildew on Sedum from Bobby Fletcher, Jr.  This disease is quite common in nurseries and unlike most powdery mildews on other hosts, very little mycelium is present and is usually only visible with the … Continue reading

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Disease Du Jour (April 20, 2011)

I’ve heard that azalea leaf gall is quite prevalent in the Feliciana parishes this spring.  Some people considered these galls to be unsightly, but I guess that a matter of personal perception.  The fungus that causes them,  Exobasidium vaccinii, only invades the young expanding leaves during … Continue reading

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Entomsoporium Leaf Spot Is Active

Received the photo on the left from Al Orgeron in St. James Parish of Entomosporium leaf spot that showed up recently on red tip photinia. Also had some show up recently on my Indian hawthorn at home. There’s still time to spray to … Continue reading

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Bark Splitting on Azaleas

Received this note and photo from Allen Ownings regarding bark splitting on azaleas.  “It was cold enough this winter to cause some bark split on azaleas. This was not noticed in early to mid March but has been detected in many landscapes … Continue reading

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Disease Du Jour (August 12)

Today’s disease photos come courtesy of Stuart Gauthier in Vermillion Parish. Several Chinese elms in a landscape bed had died suddenly, and when the bark was removed from the base of the tree, white fungal mycelium that is typically associated … Continue reading

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