Tag Archives: Louisiana Cooperative Extension Service

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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Powdery Mildew Blighting Crape Myrtles Now

Powdery mildew, caused by the fungus Erysiphe lagerstroemeriae, is once again wreaking havoc on the blooms of susceptible crape myrtle varieties. The warm, humid weather during late spring and early summer has been ideal for disease development on plants in partially … Continue reading

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Louisiana Turfgrass Association online

The Louisiana Turfgrass Association recently unveiled its new website at http://www.laturf.net.  Check it out!

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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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Another Brown Patch Sighting This Summer

Back in mid June Dr. Ron Strahan brought me a sample of active brown patch on St. Augustine from south Louisiana. Well, here it is the middle of July and Gerald Roberts, county agent in Lafayette Parish, also notified me of an active brown … Continue reading

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Disease Du Jour (June 22, 2011)

I taught a Master Gardeners class in Avoyelles Parish yesterday evening and in appreciation Dr. Carlos Smith and members of the class presented me with this beautiful bouquet. It’s not everyday that you get a bouquet of tomato flowers, especially … 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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