Foliar Diseases:
(Fungal Diseases)
Anthracnose (2)
Bottom Rot (2, 3)
Cercospora Leaf Spot
Downy Mildew (2, 3, 4)
Fusarium Wilt
Gray Mold
Powdery Mildew (2)
Southern Blight
Stemphylium Leaf Spot
Verticillium Wilt

(Bacterial Diseases)
Bacterial Leaf Spot
Corky Root
Soft Rot of Lettuce

(Phytoplasma Diseases)
Aster Yellows

(Viral Diseases)
Beet Yellow Stunt
Lettuce Mosaic
Lettuce Mottle

Root Diseases:
(Nematode Diseases)
Root Knot Nematode