O-zone Injury on Vegetables
Crystal Stewart-Courtens, Extension Vegetable Specialist
Eastern New York Commercial Horticulture
Common ozone symptoms are small, irregular, shaped spots that range in color from dark brown to black (stipple like) or light tan to white (fleck like). These spots are found only on the upper surface of the leaf. Very young and old leaves are less susceptible to ozone while newly mature leaves are the most susceptible. With severe damage, symptoms may extend to the lower leaf surface.
Insect feeding (red spider mite and some leafhoppers) produce flecks on the upper surface of leaves, much like ozone injury. Flecks from insect feeding are usually spread uniformly over the leaf surface while ozone flecks are concentrated in specific areas, usually most pronounced at the leaf tip and along the margins.
The most sensitive crops include: Bean, Broccoli, Muskmelon, Onion, Potato, Radish, Spinach, Sweet Corn, Tomato
Intermediate crops include: Carrot, Endive, Parsley, Parsnip, Turnip
Tolerant crops include: Beet, Cucumber, Lettuce
Apples
Apricots
Asparagus
Beets
Blueberries
Broccoli
Brussels Sprouts
Cabbage
Carrots
Cauliflower
Cherries
Cucumbers
Dry Beans
Eggplant
Ethnic Vegetables
Garlic
Grapes
Horseradish
Kohlrabi
Leeks
Lettuce / Leafy Greens
Melons
Nectarines
Onions
Parsnips
Peaches
Pears
Peas
Peppers
Plums
Potatoes
Pumpkins / Gourds
Radishes
Raspberries / Blackberries
Rhubarb
Rutabaga
Snap Beans
Squash - Summer
Squash- Winter
Strawberries
Sweet Corn
Sweet Potatoes
Tomatoes
Turnips
Upcoming Events
Drinkwine Produce Twilight Meeting
September 16, 2024 : Drinkwine Produce Twilight Meeting
Ticonderoga, NY
Drinkwine Produce Twilight Meeting
Monday, September 16th 4-6 pm (rain or shine)
1512 Street Rd, Ticonderoga, NY 12883
Join us for discussions on high tunnel tomato production and sweet corn and pumpkin IPM at Drinkwine Produce in Ticonderoga. Henry Drinkwine will provide an overview of his practices for maintaining high yields of tomatoes, including pollination and soil fertility management. In the second half of the meeting, CCE specialist Chuck Bornt will review integrated pest management for sweet corn and pumpkins, with hands-on scouting and identification of key pests and diseases.
DEC Credits: 1.5 credits in categories 1A, 10, 23
Korona Produce Field Meeting
September 24, 2024 : Korona Produce Field Meeting
Amsterdam, NY
Korona Produce Field Meeting
September 24, 2024, 4-6pm
Korona Farm and Produce
1953 Co Rd 107, Amsterdam, NY 12010
(pull in by the cow pasture)
Join CCE Eastern NY Commercial Horticulture Vegetable Specialists Crystal Stewart-Courtens and Chuck Bornt for a field meeting to look at tarping for weed and pest control and cover crop termination in vegetable rotations, a pumpkin variety trial walk looking at new varieties, and cucurbit IPM practices.
This meeting is free and open to the public.
2 DEC credits available in categories 1A and 23
Questions? Reach out to Crystal Stewart-Courtens at cls263@cornell.edu or 518-775-0018