Tag Archives: fruit tree diseases

Fig Rust Causing Early Defoliation

Fig rust, caused by the fungus Cerotelium fici, is already causing defoliation of fig trees in parts of southern Louisiana. This is considerably earlier than normal, but this spring’s abundance of rainfall made conditions ideal for disease development. For more … 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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Home Garden Fungicide for Control of Rust on Mayhaw

Home orchard enthusiasts growing mayhaws now have a readily available fungicide they can use for control of rust caused by Gymnosporanium clavipes.  Mayhaw has been added to the new label for Spectracide Immunox Multi-purpose Fungicide containing the active ingredient myclobutanil. For … Continue reading

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Disease Du Jour (June 13, 2011)

Todays’s disease photo comes courtesy of Gerald Roberts in Lafayette Parish. This is peach scab caused by the fungus Cladosporium carpophilum. The pathogen infects twigs and leaves as well as the fruit. Spots on the fruit are generally small (usually less than … Continue reading

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Disease Du Jour (April 11)

Received to e-mails today from folks wanting to know what they can do about quince rust on mayhaws. At this point, since the disease is already expressing symptoms, there’s not much that can be done. The spores that are produced … Continue reading

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Armillaria abundant now

Received this photo of Armillaria from Bob Souvestre in East Baton Rouge Parish this morning.  Tentative identification from Dr. Cathie Aime, our mycologist, is that it’s most likely Armillaria tabescens, which has been fruiting rather profusely in the area the last couple of days. This fungus is … 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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