Citrus Leafminer is a relatively new insect to California. This insect burrows inside the leaf leaving a silver trail as it feeds. I’s mostly a cosmetic nuisance but severe infestations can cause stress to the tree. The insect only does its damage in the Spring but exact timing is difficult to pinpoint.
For best control, we recommend using a trap with pheromone lure to monitor insect populations then treat as needed.
Does this look familiar? Ask us about the proper treatment for your tree.