Ozone in the air can damage growing leaf. Images of the damage can be seen in the link below:
IPM Images Agricultural Systems : Tobacco : Ozone
A quick way to see your current air quality rating (which changes day by day) is on this site for the US, by entering the Zip code of your physically closest post office:
While there is really nothing that you can do about it, recognizing ozone damage can save you the time of searching through all the IPM images for leaf signs that match a tobacco disease.
IPM Images Agricultural Systems : Tobacco
Bob
IPM Images Agricultural Systems : Tobacco : Ozone
A quick way to see your current air quality rating (which changes day by day) is on this site for the US, by entering the Zip code of your physically closest post office:
AirNow.gov
AirNow is your one-stop source for air quality data. Our recently redesigned site highlights air quality in your local area first, while still providing air quality information at state, national, and world views.
www.airnow.gov
IPM Images Agricultural Systems : Tobacco
Bob