- (LIHREC) indicates information from the Long Island Horticultural Research and Extension Center Vegetable Pathology website.
- (.pdf) indicates printer-friendly .pdf version available.
- List also includes some herbs and abiotic disorders.
Asparagus
- Herbicide injury (LIHREC)
Basil
- Downy mildew (LIHREC)
Beans
- Chimera (genetic disorder) (LIHREC)
- Ozone injury (LIHREC)
- Phytophthora blight (.pdf)
- Phytophthora blight (LIHREC)
Beets and Swiss Chard
- Cercospora leaf spot (LIHREC)
Carrots
- Powdery mildew (LIHREC)
Celery
- Septoria leaf spot (LIHREC)
Corn (sweet)
- Holcus spot (LIHREC)
- Northern Corn Leaf Blight (LIHREC)
- Rust (LIHREC)
Crucifers (aka brassicas and cole crops)
- Alternaria leaf spot of brassicas (.pdf)
- Alternaria leaf spot on Brussels sprouts (LIHREC)
- Alternaria leaf spot on cabbage (LIHREC)
- Alternaria leaf spot on kale (LIHREC)
- Bacterial leaf spot on cauliflower (LIHREC)
- Black leg on kale (LIHREC)
- Black rot on Brussels sprouts (LIHREC)
- Black rot on cabbage (LIHREC)
- Black rot on ornamental kale and ornamental cabbage (LIHREC)
- Cabbage chimera (genetic disorder) (LIHREC)
- Clubroot on Bok choi (LIHREC)
- Downy mildew on cabbage (LIHREC)
- Downy mildew on seedlings (LIHREC)
Cucurbits
- Alternaria (LIHREC)
- Angular leaf spot (LIHREC)
- Anthracnose (LIHREC)
- Bacterial leaf spot (LIHREC)
- Choanephora fruit rot (LIHREC)
- Downy mildew (.pdf)
- Downy mildew: Early symptoms (LIHREC)
- Downy mildew: Other symptoms and imitators (LIHREC)
- Fusarium crown rot and fruit rot of pumpkin (LIHREC)
- Fusarium fruit rot of other cucurbits (LIHREC)
- Gummy stem blight and black rot (LIHREC)
- Ozone injury (LIHREC)
- Phytophthora blight (.pdf)
- Phytophthora blight (LIHREC)
- Plectosporium blight (LIHREC)
- Powdery mildew (LIHREC)
- Pythium root rot (LIHREC)
- Sunscald of Pumpkin and Winter Squash (LIHREC)
- Virus (LIHREC)
Eggplant
- Anthracnose (LIHREC)
- Phytophthora blight (.pdf)
- Phytophthora blight (LIHREC)
- Verticilium wilt (LIHREC)
Garlic
- Bloat nematode (LIHREC)
- Botrytis Neck Rot (aka Dry Rot) (LIHREC)
- Garlic rust (LIHREC)
- Waxy breakdown (LIHREC)
Lettuce
- Crown girdling (LIHREC)
- Downy mildew (LIHREC)
- Powdery mildew (LIHREC)
- Septoria leaf spot (LIHREC)
- White mold (LIHREC)
Onion
- Stemphylium leaf blight (LIHREC)
Parsley
- Septoria leaf spot of Parsley (LIHREC)
Peas
- Powdery mildew (LIHREC)
Peppers
- Anthracnose (LIHREC)
- Bacterial leaf spot (LIHREC)
- Chimera (genetic disorder) (LIHREC)
- Cucumber Mosaic Virus (CMV) (LIHREC)
- Pythium crown and root rot (LIHREC)
- Phytophthora blight (.pdf)
- Phytophthora blight (LIHREC)
- Sunscald (LIHREC)
- Tomato spotted wilt virus (TSWV) (LIHREC)
- White mold (LIHREC)
Potatoes
- Blackleg Caused By Dickeya (LIHREC)
- Blackleg stem rot and tuber rot caused by Pectobacterium (LIHREC)
- Gray mold (LIHREC)
- Late blight (.pdf)
- Late blight (LIHREC)
- Leaf spot caused by Phytophthora nicotianae (LIHREC)
- Ozone injury (LIHREC)
- Potato Virus Y (LIHREC)
- Tomato spotted wilt virus (TSWV) (LIHREC)
Spinach
- Downy mildew (LIHREC)
- Stemphylium leaf spot (LIHREC)
- White rust (LIHREC)
Tomatoes
- Anthracnose (LIHREC)
- Bacterial canker of tomatoes
- Bacterial canker (LIHREC)
- Bacterial speck of tomatoes
- Bacterial speck (LIHREC)
- Blossom-end rot (fruit disorder) (LIHREC)
- Brown rugose fruit virus
- Buckeye fruit rot (LIHREC)
- Chimera (genetic disorder) (LIHREC)
- Drought stress (LIHREC)
- Early blight (LIHREC)
- Gray mold (LIHREC)
- Late blight (.pdf)
- Late blight (LIHREC)
- Late blight ‘imitators’ (LIHREC)
- Leaf mold (.pdf)
- Leaf mold (LIHREC)
- Ozone injury (LIHREC)
- Phytophthora blight
- Pith necrosis (LIHREC)
- Powdery mildew (LIHREC)
- Septoria leaf spot (LIHREC)
- Tomato spotted wilt virus (LIHREC)
- White mold (timber rot) (LIHREC)
- Zippering (fruit disorder) (LIHREC)