Many kinds of lace bugs, family Tingidae, feed on landscape plants throughout the United States. Hosts include alder, ash, avocado, azalea, coyote bush, birch, ceanothus, fruit trees, photinia, poplar, sycamore, toyon, walnut, and willow. Several dozen species of lace bugs occur in the western United States, mostly on trees and woody shrubs. California Christmas berry tingid (Corythucha incurvata), ceanothus tingid (Corythucha obliqua), Western sycamore lace bug (Corythucha confraterna), and the recently introduced avocado lace bug (Pseudacysta perseae) are some of the species that can be pests. Almost any insecticide will control lace bugs if it is sprayed directly onto the insects. Insecticides that are absorbed and move within plants can provide longer-lasting control than contact sprays. Imidacloprid is available to both homeowners and professional applicators. In situations where IPM-compatible insecticides are inadequate, imidacloprid is usually the preferred choice. It may provide season-long control if applied in spring before populations dramatically increase. Imidacloprid can be applied as a foliar spray or soil drench. It can be injected directly into trunks if their diameter is relatively large.
Source:
Authors: S. H. Dreistadt, UC IPM Program, UC Davis; and E. J. Perry, UC Cooperative Extension, Stanislaus County
Produced by IPM Education and Publications, University of California Statewide IPM Program, 8/06
http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7428.html
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