- Alternaria
- Angular leaf spot
- Anthracnose
- Bacterial wilt
- Bacterial leaf spot (renamed Xanthomonas leaf spot)
- Cercospora leaf spot of Cucumber
- Choanephora fruit rot
- Downy mildew of cucumber and other cucurbit plants (for gardeners)
- Downy mildew: Early symptoms
- Downy mildew: Other symptoms and imitators
- Edema
- Fusarium crown rot and fruit rot of pumpkin
- Fusarium fruit rot of other cucurbits
- Gummy stem blight and black rot
- Herbicide injury
- Ozone injury
- Phytophthora blight
- Plectosporium blight
- Powdery mildew
- Pythium fruit rot
- Pythium root rot
- Scab
- Sunscald of Pumpkin and Winter Squash
- Virus
- White mold on cucurbits
- Xanthomonas leaf spot (formerly Bacterial leaf spot)