Leaf miner season has begun; time to treat your citrus leaves.
What is it again?
“Citrus leafminer” is a leaf deforming disease that will impact just about every untreated citrus tree in the US (and elsewhere). It causes a lot of damage and can be devastating to young trees. The disease is caused by the larva of a tiny month that eats its way through the under-surface of a leaf. The bug came to the US relatively recently and is now widespread.
Earlier each year:
The disease hits in the warmer months and the leafminer season seems to be happening earlier each year. I am not sure if I am just noticing it occurring earlier or if global warming is causing it to happen earlier each year. Regardless, the disease has begun last month (May) and this short post is just a reminder that it is time to start treating your trees again.
I have written a complete article about leafminer a few years ago. It covers everything from diagnosis, cause and treatment options. That article is up-to-date. For more info, you can get to that Citrus Leafminer: Diagnosis and Treatment article via the hypertext link. I always use the organic spray mix that is detailed in the article. It works great for me, but there are other treatment options.