Showing posts with label tomato blight. Show all posts
Showing posts with label tomato blight. Show all posts

Sunday, August 9, 2009

Pulled half the tomatoes today

We have late tomato blight. Paul pulled half the plants hoping that giving the rest more space might help. We didn't even try to ripen any green ones. This guarantees that we rotate our vegetable garden to new soil next year.
From Purdue
Late blight, caused by the fungus Phytophthora infestans, occurs in moist weather with cool nights and moderately warm days. Dark-green to nearly black wet-looking spots begin spreading in from the leaf edge. In wet weather, the spots may have a downy, white growth on the lower leaf surface near the outer portion of the spot. Spots also develop on the fruits. At first, the spots are gray-green and water-soaked, but they soon enlarge and turn dark brown and firm, with a rough surface. When conditions are favorable, the disease may progress very rapidly.