Homoptera: Diaspididae, Unaspis euonymi (Comstock)
Severely infested shrubs can be pruned to the ground and the new shoots can then be treated to protect them from infestation. Mulch and water drought stressed shrubs to reduce the impact of scale damage. Avoid overfertilization as this can trigger a growth in the pest population. A biological control agent, Chilocorus kuwanae, which is a small lady beetle has been released in Virginia for control but at this time has had limited impact on pests populations. This lady beetle can be recognized by its black color and two distinctive red spots on the back. Insecticides, other than horticultural oils during the dormant period, should not be used when Chilocorus are present.
Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University.
Issued in furtherance of Cooperative Extension work, Virginia Polytechnic Institute and State University, Virginia State University, and the U.S. Department of Agriculture cooperating. Alan L. Grant, Dean, College of Agriculture and Life Sciences; Edwin J. Jones, Director, Virginia Cooperative Extension, Virginia Tech, Blacksburg; Jewel E. Hairston, Administrator, 1890 Extension Program, Virginia State, Petersburg.
May 1, 2009