The weather conditions this year have been favorable for early and late
blight on tomatoes. Given the right
conditions and an early initial infection, late blight can be a devastating
disease on both tomato and potato crops.
The most common symptoms on tomatoes
are sunken, dark green or brown lesions on leaves and brown lesions on stems,
with white fungal growth developing under moist conditions.
Preventative measures include sound crop
rotation, proper spacing, pruning, and avoiding overhead irrigation. The key is spraying preventatively. Once plants are infected with late blight,
it's too late to save them. Before using
any products, read the label and then use accordingly. For more information please refer to Perennia’s
Tomato Management Schedule, a guide to weed, insect and disease management in
tomatoes.
