08/14/2026
Citrus leafminers are moth larvae that actually mine between a young leaf’s upper and lower leaf layers and leave a squiggly trail as they feed.
Next they exit the leaf and wrap an edge around itself to pupate. They then become tiny white moths.
The damage it leaves doesn't seriously harm a mature citrus tree, but can interfere with leaf development and photosynthesis on young trees
One tip to prevent or reduce them is not to prune in the late spring or summer. This will stimulate new growth during the summer, and that’s what they are looking for.
If you prune in the very early spring, the new growth will usually have time to harden before the citrus leaf miner comes around.
Now let’s talk about treatments:
we always encourage the most non-toxic and natural ways to treat pests on fruit trees.
When it comes to using a pesticide, the problem is that the beneficial insects will be affected also.
And because the pest is in-between the layers, they can be hard to reach with a spray or oil.
The damaged leaves look ugly, but if the infestation is light, it may be better not to spray and instead just squish them with your fingers or even leave them alone.
There are a variety of treatments on the market with the active ingredient spinosad, which is effective against the exposed larvae.
It can be toxic for honeybees if they are exposed to the product before it has dried, so if you have to spray, use this in the evening so that has time to dry by the next day.
Since citrus flowers attract bees, it's safest to avoid spraying on flowering trees, particularly products that are toxic to bees.
