About ozone injury

Ozone enters leaves through small pores on the leaf surface and causes damage to leaf cells. As ozone pollution does not result in a residue on the leaves, visible leaf injury is the most easily detectable evidence of damage.

Ozone damage on soybean leaf
Ozone damaged courgette leaf

Ozone damage can cause spotting on the leaf surface, for example in a) soybean (Glycine max), b) courgette (Cucurbita pepo).

Find out more information on the symptoms of visible ozone injury.

There are also other possible causes of leaf damage that may be mistaken for ozone injury, including leaf viruses and disease.

We have created a gallery of photographs of examples of ozone injury in a variety of different species:

Examples of ozone damage in crops
Examples of ozone damage in trees
Examples of ozone damage in grassland
Examples of ozone damage in heathland

It is also possible to regularly check the local levels of ozone in your area, using the following websites.
Photos courtesy of: B Gimeno (a); D Velissariou (b)