Treatment for Tree Mites

Syringing

• Mites are less prevalent during wet, rainy periods because water causes mites to fall from tree branches and leaves. Syringing is a procedure that was adapted using this principle. Spraying water from a hose or spray nozzle produces a hard stream of water, which can knock mites from host trees. Syringing trees two to three times each week can control tree mite infestations and preserve insects that are considered natural tree mite predators.

Natural Predators

• Certain types of insects such as lady beetles are natural predators that feed on tree mites. Other types of mites such as Amblyseius spp. are predatory mites, which feed on tree mites. Releasing predatory mites and insects is an effective means of mite control, but works best with light infestations. Contact your local extension office to determine which type of natural predator will work with your tree and environmental conditions. Never apply pesticides to trees after releasing natural predators because it will kill them.

Soaps And Oils

• Horticultural soaps and oils are effective mite control methods. Dormant and horticultural oils are often recommended to kill mite eggs and dormant adult mites during the spring and fall months. Horticultural soaps are most commonly applied to trees with mites during the hot summer months. These products work only when they come into direct contact with spider mites and their eggs, so be certain to apply them in a manner that covers the entire tree.

Miticides

• Most tree mites are not controlled using regular pesticides. Miticides are the most effective type of chemical control in tree mite infestations. Homeowners often have a difficult time purchasing chemicals that contain a strong miticide. A few products contain malathion and diazinon, which are miticides and are often effective. The strongest and most effective miticides are available only to licensed pesticide applicators. Apply any miticide to your tree according to the manufacturer's directions for best results.