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The citrus leaf miner is a new insect pest that has started showing up in Southern California. The larvae are laid by tiny, minute, silvery white moths that tunnel within the leaves, leaving snaking trails of dead tissue behind. Other symptoms of infestation include curling of leaves and, in severe cases, even succulent young branches of green shoots may be attacked.
Although leaf miners don't usually demolish an entire plant, they can cause quite a bit of unsightly damage. This makes it important to start controlling this pest at the first signs of attack and following up with repeat applications to break the life cycle of this insect pest.
Citrus leaf miners tunnel between the upper and lower surfaces of leaves to lay eggs. The clear waxy trail they leave behind is unmistakable--and permanent. Once they eat a path between leaf surfaces, they drop off the leaf to pupate in the soil beneath. Then the whole process starts over again, yielding several generations of leaf miners over the course of a summer.
Controlling leaf miners is difficult, even with chemicals, because they are protected by the upper and lower leaf surfaces. We recommend treating your infected plants with an insecticide containing Spinosad, such as Green Light Spinosad. Another effective control is to remove (and destroy) affected leaves. You can also treat the leaf surface with a citrus oil-based pesticide, such as Jungle Rain Leaf Clean, which can help to prevent tunneling by future generations. |