Severe infestations can kill young trees and reduce quality and quantity of a mature tree’s harvest. Add to Cart. Farmingville, NY 11738 Jim Luzar, an Extension Educator with Purdue Extension shows you how to treat Tulip Poplar Tree Scale. White Prunicola Scale (WPS) is a serious pest of Prunus, especially in temperate areas. – Low (1) does not have high reproductive or dispersal potential. Therefore, it receives a High (3) in this category. There are more than 25 species of scale insect found in British Gardens. Control adult scale by pruning heavily infested branches; control tiny young “crawlers” with a hard spray of water from a garden hose (use a hand lens to see scale). Soft scales secrete large amounts of honeydew, which can cause the growth of sooty mold. Pseudaulacaspis prunicola is a highly polyphagous scale that is not known to be present in California. In the eastern United States, it is reported from Florida north to Massachusetts (Miller and Davidson, 2005). Kyle Beucke, 1220 N Street, Room 221, Sacramento, CA, 95814, 916-403-6741, plant.health[@]cdfa.ca.gov. Honeydew on plants may attract ants as well as sooty mold, which is a black fungus that can result in the death of the plant. Introduction. Life Cycle . Bark-feeding scale insect that can form high populations rapidly. Close examination of an infestation (picture on the left) would reveal males (elongate and yellow), rounded and yellow, and dead male (dead from pesticide application; elongate and tannish brown). Therefore, it receives a Medium (2) in this category. Armored scale insect pests of trees and shrubs (Hemiptera: Diaspididae). ... Euonymus, white peach and white Prunicola scale can be sprayed in early September with a 2 percent rate … Taxus Scale. There is some uncertainty regarding the species identity of P. prunicola. These scales tend to be harder to spot on plants, and can be hard to treat. In 2013, we added Indian wax scale, white prunicola scale and juniper scale to the monitoring list to better determine crawler periods. Feeding, which occurs only during the night, results in notched leaf margins. Moderate infestations have caused defacing die back to the flowering cherry trees growing around the scenic tidal basin area of Washington, D.C., and heavy infestations have killed many of these priceless trees (personal observations of authors). Cankerworm . White prunicola scale (Pseudaulalacaspis prunicola) is an armored scale insect that infects members of the Prunus species, and various other ornamental plants.It is one of the most significant pests of cherry and peach trees. – High (3) has both high reproduction and dispersal potential. Thousands of dollars are spent each year on the control of this pest as infestation can become significant. This can cause dieback, which is usually preceded by leaf yellowing, browning and premature leaf drop. The pest could have a significant environmental impact such as lowering biodiversity, disrupting natural communities, or changing ecosystem processes. The disease … In northern Pennsylvania, the scale is bivoltine (two generations per year). This photo shows Prunicola Scale, a very hard to control scale insect that damages and can even kill cherry trees and other ornamental trees, and horticultural oils are very helpful in controlling this pest. Do not expect adult scale to fall off after an insecticide treatment. Some of the host plants that have been identified are privet, mulberry, paper mulberry, catalpa, and chinaberry. All Rights Reserved. Soft scales produce a hard layer of wax on their outermost skin that provides protection. The WPS is more common in temperate climatic zones. There are more than 25 species of scale insect found in British Gardens. Female scale have a round, white body with an orange to yellow central hue that gives them a “fried egg” appearance. 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