In the photo you can see off white lines in the leaf surface. This is a leaf off a satsuma tree, and it has been infested with the citrus leaf miner. The leaf miner makes tunnels between the upper and lower leaf surface. This is a common problem with citrus in our landscapes. They are attracted to new flushes of growth in citrus trees, so avoid heavy uses of nitrogen fertilizer.
Here is a good control guide from UC Davis on citrus leaf miners. We also have control recommendations on our website found here.
You can also email us at the office (uge4275@uga.edu) or visit with our Master Gardeners for more help.
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