If egg masses or aggregations of young caterpillars are discovered, the effected leaves or branches can be pruned out. Make sure not to forget to spray the underside of leaves as these can be where Tussock Moth Caterpillars hide out of view.
Allergic reactions to the hairs have not been associated with hickory tussock moths; however, a 5-year-old boy suffered an allergic reaction after exposure to the related spotted tussock moth (Lophocampa maculata) so allergic reactions may be possible. The American Journal of Emergency Medicine, 19(5): 396–398.
Tussock moths are easy to identify. They produce bright tufts of hair as they grow. B. Keiper, A. W. Jones, & J. E. Arnold. Douglas fir tussock moth caterpillars have a lot of natural predators in Colorado. Necessary cookies are absolutely essential for the website to function properly. The hairs are used for defense and may irritate the skin of sensitive individuals. Because hickory tussock moths are a native species, they are usually controlled by a host of natural enemies. The moth is dull-colored as an adult, but its hairy caterpillar phase of development is known for defoliating small trees and shrubs if left unchecked. Entering your postal code will help us provide news or event updates for your area. Mature caterpillar spinning a cocoon. They develop brown hair patches and red spots with an orange stripe on each side at maturity. Follow this guide and use the recommended products and we guarantee 100% control of Tussock Moth Caterpillars.
Finally, Reclaim IT Insecticide quarterly to prevent potential reinvasion. If you spot any pupation cocoons, remove them with the help of tweezers. The caterpillars begin feeding on new foliage near the top of the trees. The Tussock moth caterpillar (Orgyia psuedotsugata) eat the needles of spruce, Douglas fir, and true fir trees. Outbreaks of Douglas-fir tussock moth are cyclical due to effects of several natural controls. Step 1 - Apply Reclaim IT Insecticide To Yard and Ornamentals. Sign up for our newsletter today! Calculate the square footage (length x width (in feet) = square footage) of your lawn to determine how much Reclaim IT you need to cover the entire area. Bt is very selective in what it affects (the subspecies Bt kurstaki affects only caterpillars), so is safe to use around pollinators and other beneficial insects. If many young caterpillars are found on smaller (generally <15' tall) trees, a product containing Bt (Bacillus thuringiensis) or spinosad can be applied. It also has a long residual effect that can continue to control pests for up to 90 days after application. At least seven species of parasitic wasps and a tachinid fly have been identified as parasites that are locally present. But opting out of some of these cookies may have an effect on your browsing experience.
Hickory tussock moth. Adult moths are attracted to lights at night. Tree tops can often be completely destroyed after a single season. In addition to other natural tussock moth controls, the weather can also reduce Douglas fir tussock moth populations. But again, by the time older caterpillars are present, it is unlikely that their feeding will damage the long-term health of the affected tree so control is rarely warranted. Hickory tussock moths have one generation per year.