ORNAMENTAL DISEASES

Diseases of Greenhouse Ornamental Crops
This fungal pathogen causes a major disease in vinca in the landscape but it can also be a serious disease of greenhouse-grown vinca.

Impatiens Necrotic Spot Virus - Part I
Impatiens necrotic spot virus (INSV) can be one of the most serious viral pathogens of greenhouse crops. INSV is sometimes confused with tomato spotted wilt virus (TSWV), a closely related virus that shares many similarities and characteristics with INSV.
Author: Larry W. Barnes

Myrothecium Root, Crown, and Stem Rot in Pansy (pdf)
The fungus Myrothecium roridum is often considered to be a weak, opportunistic pathogen that invades plant tissue that has been injured or stressed . Myrothecium has caused problems in foliage and some other ornamentals in the past but recently, some growers have noted serious production losses in pansy production.
Author: Larry W. Barnes

Plant Pathology Update

Poinsettia Disease Primer
Poinsettia production is in full swing and growers should be aware of several disease problems that can cause at various production phases. Careful attention to sanitation, irrigation, spacing, pesticide application, and environmental conditions in the greenhouse can help minimize disease problems.
Author: Larry Barnes

Texas Plant Disease Handbook

Watch for Pythium & Phytophthora Problems
Each year during the spring months, there are a significant number of plant disease problems submitted to the Texas Plant Disease Diagnostic Laboratory (TPDDL) resulting from infection by the water-mold pathogens,Pythium and Phytophthora.
Author: Larry W. Barnes