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Handle carefully and store in original labeled containers out of the reach of children, pets, and livestock. Read and follow directions and safety precautions on labels. This lady beetle is 3- 4.5 mm long, black with two red spots on its wing covers. Heavy infestations may occur on twigs or leaves that can cause defoliation of the plant. The euonymus scale is a key pest of deciduous and evergreen euonymus, Euonymus spp., pachysandra, Pachysandra spp., and bittersweet, Celastrus spp. The euonymus scale, Unaspis euonymi, is an armored scale that can cause complete defoliation or even death of the evergreen Euonymus. The male's white, narrow, waxy cover is about 0.8 mm long (Fig. By entering your email, you consent to receive communications from Penn State Extension. You must have JavaScript enabled in your browser to utilize the functionality of this website. An infestation of this armored scale may result in twig dieback or death of the plant. Euonymus is a family of shrubs, small trees, and vines that is a very popular ornamental choice in many gardens. Figure 1. One type of scale that attacks euonymus shrubs (especially Euonymus japonica) is the euonymus scale (Unaspis euonymi).This is an armored type of scale that comes in two colors: Males are white and females are brown. It is now established in the United States and Canada. Scale (or armored scale) describes a common family of insects that feed on various shrubs and trees. The waxy cover of a mature female is approximately 2 mm long, grayish-brown, flattened, and pear-shaped (Fig. Dispose of empty containers right away, in a safe manner and place. The crawlers wander over the bark and foliage for a short time, settle, and then begin to feed. Eggs hatch over a 2-3 week period into first instar nymphs called crawlers. Prune and destroy heavily infested branches or twigs when indicated. This armored scale insect is native to Japan and China. The euonymus scale is a key pest of deciduous and evergreen euonymus, Euonymus spp., pachysandra, Pachysandra spp., and bittersweet, Celastrus spp. Entering your postal code will help us provide news or event updates for your area. This armored scale overwinters as fertilized females. Description Adult males emerge as tiny wasp-like insects. This armored scale insect is native to Japan and China. This is especially true with various vine types of euonymus. Both suck on plant tissue, which can cause damage. It does this with its piercing-sucking mouthparts that results in a reduction of plant health and yellowish stippling or spotting of the foliage. Four to six weeks are usually required to complete development to adults. Authored by: Gregory A. Hoover, Sr. Extension Associate. The lady beetle, Chilocorus kuwanae, was introduced several years ago in the eastern United States to assist with the management of euonymus scale. This pest is most difficult to effectively manage at the base of infested plants near the ground. Controlling euonymus scale bugs can be … Vine-type euonymus are extremely susceptible to attack by this scale. Do not contaminate forage, streams, or ponds. This scale also attacks a number of other plants such as English ivy, hibiscus, holly, honeysuckle, lilac, and pachysandra. 1b). To reduce populations of first generation crawlers, apply a registered insecticide according to label directions during late May through June. A second generation of crawlers is produced during late July through August. They begin laying eggs beneath their protective cover in late April and May. Individual scales are small and are often overlooked until serious damage has occurred. One common and sometimes devastating pest that targets these plants is the euonymus scale. Why do we need this? 1a). LEARN HOW TO STOP THE INVASIVE SPOTTED LANTERNFLY, Coronavirus: Information and resources for the Extension Community, Save For Later Print Available in Spanish, Gyorgy Csoka, Hungary Forest Research Institute, Bugwood.org. Second generation crawlers should be managed with applications made during late July through August. Adult euonymus scale waxy cover (a. male; b. female). This armored scale insect is native to Japan and China. It is now established in the United States and Canada. Euonymus Scale (Unaspis euonymi): This is the most common and most serious pest found on euonymus.The protective armor covering of an adult female euonymus scale is dark, oyster-shaped and about 1 / 16-inch in length.Adult males are very small, winged insects that leave their narrow, white armored covering for mating. Get notified when we have news, courses, or events of interest to you. The euonymus scale is a key pest of euonymus, pachysandra, and bittersweet. Pesticides are poisonous. View our privacy policy. This key pest causes injury to host plants by removing fluid from non-vascular plant cells. JavaScript seems to be disabled in your browser. The crawler stage of this key pest is about 0.3 mm long and yellowish-orange. See All Pest, Disease and Weed Identification, See All Beer, Hard Cider, and Distilled Spirits, See All Community Planning and Engagement. Vine-type euonymus are extremely susceptible to attack by this scale. Males feed and develop under their waxy covers, mate with the females, and die. Of interest to you crawlers is produced during late July through August injury to host plants removing! To complete development to adults defoliation of the foliage occur on twigs or leaves that can cause of. Or even death of the evergreen euonymus and yellowish-orange this website courses or. Heavy infestations May occur on twigs or leaves that can cause defoliation of the foliage authored by: a.! 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