The protective covering on this scale is circular in shape, somewhat convex, about 3mm in diameter, and dirty gray with an occasional small black cap near the center. Treatment Strategy. Fertilization with Arbor Green … This will smother the insects before they can turn into an adult. The female obscure scale, Melanaspis obscura, is light yellow to cream color, but her armor is a shallow dome about 1/8 inch in diameter.The armor is dirty gray, with a black cap that is slightly off center. Crawlers found mid-July through September. Barkis usually intact beneath a scale. Like most scale pests, the female attaches herself to the bark of twigs and sucks sap from the tree. Davey uses cookies to make your experience a great one by providing us analytics so we can offer you the most relevant content. Check plants for live scale infestations. Under severe infestations, the trunk or branches may be disfigured. , Jim Casey Joins Rainbow as a Territory Manager. Flip over suspiciouslooking bumps on twigs and branches with a thumbnail. Soft scales are slightly larger, about 1/4 inches long, and smooth, cottony or waxy. If treatment is necessary, spray the tree or shrub with a dormant rate of horticultural oil during the dormant season to control overwintering scales. DAMAGE . Obscure Scale – On Oak Q: We have planted several trees to try to make a natural area at the rear of our property. Obscure Scale- Beyond Pest Control is a fast reliable pest control company, We've been in the business since 1971. This water soluble insecticide is taken up by the roots and transported throughout the plant where it is ingested by sap feeding insects. Gloomy scale (Melanaspis tenebricosa) Obscure scale (Melanaspsis obscura) Soft scales (Hemiptera: Coccidae) differ from armored scales in a few important ways. View our Privacy Policy for more information. New Jersey’s Department of Human Services, which runs the mental health treatment at the STU, did not respond to a request for comment by publication time. Obscure Scale Eric Day, Department of Entomology, Virginia Tech Attacked: Primarily oaks, chestnuts, pecan and other hickories, but also several other ornamental trees. However, over-fertilization favors scale buildup. Biological control of obscure scale (Homoptera: Diaspididae) in California: an experimental approach Author: Ehler, L.E. Obscure Scale (Melanaspis obscura): Small (1/16"), round gray scales. Armored scales produce an external covering to conceal their bodies completely. Oil as crawlers emerge in July. Bait treatments and insecticides can be used to control ants in the outside nest. Crawlers, nymphs and adults feed on sap. Numerous species of scale insects, typically classified as soft or armored, can attack a broad array of shrubs. The small, gray to dark gray insect blends with the natural color of the bark and can be difficult to see. The oil suffocates them quite effectively. Last fall I treated my trees systemically with Bonide but I noticed today the leaves are sticky and shiny indicating the treatment didn't work. and lecanium scales (Eulecanium spp.) By continuing to use this site, you accept our use of cookies. Source: Environmental entomology 1995 … An insecticide application when … Fall time sprays with a pyrethroid insecticide including active ingredients permethrin, lambda-cyhalothrin, or bifenthrin may be applied. This cover will have a diameter of no more than 3mm when the insect is mature. All Rights Reserved. Newly emerging (eclosing) nymphs settle close together underneath mature scales, forming overlapping layers. Encrusted layers of waxy covers secreted by obscure scales on oak. Numerous sunken areas appear on the back where it feeds and gives a roughened appearance. One of the more interesting and eco-friendly treatments to combat scale is to use beneficial insects. Kermes scales (Kermes spp.) Small twigs and larger branches may die when an infestation is severe. Figure 1. Other common hosts are: Obscure scale causes trees to develop a sparse, unhealthy appearance with small, off-color leaves.On close inspection, the bark may appear to be sprinkled with wood ashes and if scratched, numerous circular flat scales flake off. Females lay eggs in summer. Scale covers can overlap on branches and twigs. Dormant Season . This will control kermes when the scale crawlers are migrating. Culture results were positive, and the final identification made was Nannizziopsis spp. The white egg sacs burst open in July as the eggs hatch and the immature scales crawl out to the leaves. Males emerge first and then crawlers emerge later in summer and are active for a short time. Asked May 15, 2016, 11:20 PM EDT. Gloomy scale is very difficult to manage after populations are established. Oak pit scales; Obscure scale. Chemical applications at this stage will require fewer treatments and will have a less detrimental effect on the natural enemies of obscure scale. Patches of scale several layers deep that create rough encrusted areas on bark. It occurs throughout the United States and is more common in northern states than southern states. Whenthe bump itself can be squashed it is likely to be some othertype of scale. Researchers have created the Obscure Scale Emergence Growing Degree Day Model to better predict … Thorough spray coverage is especially critical when treating armored scales and oak pit scales as these scales are generally less susceptible to pesticides than soft scales. Asked May 15, 2016, 11:20 PM EDT. Bernalillo County New Mexico. The underside of the waxy covering is black except for a white, silk-like coating in the center. All other stages, including the eggs, are pink but are hidden by their gray armor. Obscure scales overwinter as nymphs on host twigs and branches. Sunken areas on bark creating a rough appearance. Summer oil treatments: Oil smothers exposed eggs, crawlers, and immature females. This provides a means of scale control without reliance on sprays. When this scale insect was first described in Europe in 1758, it was referred to as the mussel scale. Have small silver flakes sprinkled on them, L.E reliable pest control company, we 've been in business... Country, have been canceled or scaled back develop a sparse, appearance... ) soft scales or mealybugs plant health serum β-D-glucan was strongly positive >... A great one by providing us analytics so we can offer you the most results... Their barely visible legs and antennae after settling and are active for a and... With a thumbnail prevents further infestation female is almost identical to the color of the waxy cover of scales... 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