Here is a quick reference guide to some of the most common citrus tree pests:

Aphids: Though it is next to impossible to not have any aphids present while growing trees, they can grow in numbers rapidly and can do a lot of damage in a short amount of time. The marks left by aphids are often confused with other citrus diseases because of the dark marks which appear on the leaves. Aphids can damage a tree’s growth by sucking the sap from their leaves and causing leaves to drop and dry.

Citrus White fly: A common pest to appear on all types of citrus trees, Whiteflies are a winged insect close in size to a common fruit fly. Whiteflies will often hide on the underside of a tree’s leaves and suck the honeydew sap from the leaves veins. Similar to aphids the damage left by whiteflies is often confused with leaf rot and is similar in appearance to mould.

Orange-dog caterpillars: A large insect, orange-dog caterpillars will eat and rip the edges of a trees leaves. Though this type of caterpillar is most common in Florida it can be found on plants which have been imported and sold in other regions. The best way to rid your tree of orange-dog caterpillars is to remove them by hand. But be warned, when disturbed this species will spring two red “horns” from its head and spray a foil smelling odor.

Citrus Thrips: One of the most damaging of all citrus diseases and pests, the citrus thrip will ruin a young tree’s leaves, fruit, blossoms and roots. These persistent pests are yellow and orange in color and can usually be found on the underside of the tree’s lower leaves. The marks left by citrus thrips will be quite evident as most of the fruit, blossoms and leaves which are attacked will shrivel up and dry out completely.

Citrus Bud mite: Though bud mites can attack any type of citrus tree, they are most commonly found on lemon trees. Bud mites will appear only in hot and humid climates and will enjoy feeding on the lemon blossoms and fruit buds. To rid your plant of bud mites consider using the same all natural sprays that you would to eliminate any citrus diseases.