Dr. Mathews Paret from the UF/IFAS Quincy Research and Education Center has some really good disease information resources that can be used for your own information or for some of your crop scouting. Please scan below to see what is available on his U-scout web page.
New in Plant Disease Blog: http://nfrec.ifas.ufl.edu/paret/u-scout/Blog/Blog.html
Phytophthora crown and root rot of scotch bonnet
Phytophthora root rot of boxwood
Phytopthora root rot of gardenia
New in Extension Tutor: http://nfrec.ifas.ufl.edu/paret/u-scout/Tutor.html
Latest field trial data on bacterial spot, bacterial wilt, target spot and root-knot nematode management on tomato.
Latest field trial data on gummy stem blight (watermelon), powdery mildew (watermelon, cantaloupe), and Phytophthora crown and root rot of squash.
Latest field trial findings on management of diseases of crape myrtle using resistant varieties
History and present status of watermelon rind necrosis
This section also includes tutorials on many other aspects: hands on identification of tomato and cucurbit diseases, Florida and South Eastern Vegetable production handbooks 2014, rose and cucurbit diseases and management, and other topics on plant disease management.
Plant disease databases: Databases includes 100s of pictures of vegetable diseases (tomato, cucurbits, pepper, and brassica crops) and ornamentals (rose, crape myrtle, hydrangea, and magnolia). Most of the pictures are field shots and reflect how you may see the disease in the field.
Crape Myrtle: http://nfrec.ifas.ufl.edu/paret/u-scout/Crapemyrtle/Crapemyrtle.html
Disease Watch section for tomato, cucurbits, rose and hydrangea for Fall 2014 is issued and details can be found in the following link.
Pest Alert: First discovery of Rose Rosette Virus in Florida