Western Red Cedar Pests

A typical sight in landscaped gardens, the western red cedar (Thuja plicata) gives a great wind barrier. The tree, which grows in U.S. Department of Agriculture plant-hardiness zones 5 to 8, is an ever-green with dark green foliage. It may reach up to 80 feet and grows right into a form. The red cedar is attacked by several kinds of pests. Some trigger injury that is moderate while the others can destroy the trees.

Aphids, Scales and Accurate Bugs

Some small pests harm trees. Aphids, bugs, moment cypress scale and juniper scale leaves, stems and delicate components of fluids. As they feed the pests might inject toxins. The aphids that are licelike leave-behind sticky waste. Black fungus called sooty mould grows on the honeydew and disrupts photosynthesis. Moment and Juniper scale cypress scale appear like small spots on leaves and have a tough covering safeguarding their delicate bodies. Leaffooted bugs seem like small flies and abandon a pale stippling pattern on leaves. Small numbers of the insects aren’t significant threats to trees. Natural enemies of aphids, like parasitic wasps, lady bugs and lacewing, manage populations of the pests. If infestations of scales and aphids becomes significant, low-toxicity pesticides like insecticidal soaps, neem oil and narrow-range oil sprayed on assist control infestations.

Beetles, Moths and Weevils

Pests of red cedars that consume bark contain cedar and cypress cypress bark moths, bark beetles and weevils. The beetles are small cylindrical- . They lay eggs and tunnel into twigs. Their existence is indicated by the existence of microscopic holes holes in bark. Larvae feed on foliage and bark. Moths and beetles depart dirt in tree wounds. Pine weevils are small beetles about 1/4 inch-long. They chew on foliage and tree-bark. Conditions that offer prime surroundings for all these pests contain soil that is soggy due to over-watering, bark and over-fertilized soil. There’s not much you can do to get cleared outside of pruning and discarding infested limbs, of bark beetles and moths. The tree needs to be removed in the event the trunk has serious infestations of beetles. Generally, serious injury is not caused by pine weevils.


The cypress suggestion miner is included by the most frequent species of leafminers that assault red cedars. True to its title, the larvae of the type of leaf-miner prey on the tips of branches. Females lay eggs on ideas of trees plus they hatch as larvae that were yellow or green. The larvae spin cocoons between little twigs. Tree tips that are infested brown and then first-turn yellow. Insecticides that contain acephate, the slightly poisonous chemical, get a grip on populations of suggestion miners.


Sawflies are wasplike and winged insects that have. Cypress and conifer sawflies consume buds, leaves and stems. Huge holes are left by them . Infestations of the pests eliminate trees and can stunt plant development. Reasonable and minor infestations only direct to your loss of leaves. Natural enemies of the pests contain some species of beetles, wasps and fungal illnesses. Larvae can be killed by soap sprays.

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