Chlorotic lesion on upper surface, sporulation on lower surface:
- Leaf mold | See factsheet for more information
Symptoms: light yellowish areas on upper surface that correspond with olive-brown fungal masses on lower surface. Primarily a greenhouse disease and taken to the field on transplants.
- Powdery mildew (Leveillula), not known to occur in the Northeast. Common in California.
Symptoms: yellow lesions on the upper surface with a light powdery fungal sporulation on the lower surface. Typically found in dryer western States.
Whitish fungal growth, mainly circular on upper surface:
- Powdery mildew (Oidium) | See factsheet for more information (LIHREC)
Symptoms: white, powdery fungal growth appears on upper and lower leaf surface. Typically a greenhouse problem but can be taken to the field on transplants.
More information/prepared by:
- For more information, please contact:
Meg McGrath – mtm3@cornell.edu & Chris Smart – cds14@cornell.edu - Originally prepared for Vegetable MD Online by Thomas A. Zitter.