Late blight in US growing regions

Reports of late blight in the southern US (Louisiana, Florida, Maryland) have the vegetable industry on alert.  In recent days, late blight has also been found on tomato transplants in a greenhouse in Pennsylvania.

Growers in Ontario should scout their tomatoes carefully for signs of late blight.  If inoculum reaches the area, the risk of an outbreak is highest during cool, wet weather.

If late blight symptoms are found, a fungicide program needs to be implemented immediately.  Watch for more information in future updates.

Early symptoms of late blight on tomato leaves
Early symptoms of late blight on tomato leaves
Sporulation of late blight lesions on underside of leaves in moist conditions
Sporulation of late blight lesions on underside of leaves in moist conditions
Typical late blight lesion on tomato leaf
Typical late blight lesion on tomato leaf