Lichens are fascinating organisms. They are composed of two different organisms – a fungal partner and a photosynthetic partner in a symbiotic relationship.
Symptoms and look-alikes.
Lethal yellowing, a deadly disease affecting palms, has recently been identified in silver date palms and Chinese windmill palms in Baton Rouge.
Mirlitons are susceptible to a common fungal disease called powdery mildew. Mirliton powdery mildew is caused by Podosphaera xanthii.
Oleander leaf scorch (OLS) is a deadly disease of oleander that was first reported in California in the early 1990s.
In Louisiana, Canary Island date palm (Phoenix canariensis Hort. Ex Chabaud) is a signature palm planted in New Orleans and nearby cities.
Texas Phoenix palm decline is a fatal disease of palms. Also called date palm lethal decline, it had only been found in Florida and Texas until recently.
Rose rosette disease is caused by a virus known as Rose rosette virus. It is a devastating disease of roses – particularly since all cultivars are susceptible.
Downy mildew of sweet basil is a destructive disease that was first detected in the United States in 2007.
Citrus greening, also known as yellow shoot disease or huanglongbing, is one of the most devastating diseases of citrus worldwide.
Bacterial gall on Loropetalum (Loropetalum chinense) is caused by a plant pathogenic bacterium called Pseudomonas savastanoi.
Sweet olive is susceptible to a bacterial disease called leaf scorch, which is caused by Xylella fastidiosa.
Boxwood blight, also known as box blight, is a fungal disease caused by Calonectria pseudonaviculata (Cylindrocladium pseudonaviculata, C. buxicola).
Like Spanish moss, ball moss is an epiphyte and belongs to family Bromeliaceae.
Citrus canker is a bacterial disease caused by Xanthomonas citri subsp. citri. It is thought to have originated in Southeast Asia.
Take-all root rot is caused by the soilborne fungus Gaeumannomyces graminis var. graminis (Ggg), frequently is found in association with turfgrass roots.
Large patch is the most common disease of warm-season turfgrasses in Louisiana. This disease is caused by the soilborne fungus Rhizoctonia solani.
Downy mildew, caused by Pseudoperonospora cubensis, is a potentially destructive disease of all cucurbits. The use of fungicides is the primary means of managing this disease.
Information about publications related to plant diagnostics, including LSU AgCenter's Plant Pathology Disease Identification and Management Series.
Diseases can be a limiting factor to the commercial production of strawberries in Louisiana. This document provides information on the fungicides available to manage these diseases.
A variety of diseases affect both the quality and performance of turfgrasses in Louisiana. This publication provides information on fungicides registered for use on turfgrass in Louisiana.