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Gardens

LACE BUGS

Lace bugs are common harmful insects of a variety of ornamental trees and shrubs. They live on the under side of leaves and literally suck the juices through their slender mouthparts. As the lace bugs feed, producing a white spot on the upper part of the leaf, they drop a varnish like substance onto the surface of the leaf. They are called tar spots.

The adult lace bug is about 1/8 to 1/16 inch long. They are slow moving insects.

Some of the more common lace bugs are:

  • Azalea lace bug
  • Hawthorn lace bug, also known to attack cotoneasterk pyracantha, flowering quince, crabapple, mountain ash and shadbush.
  • Oak lace bug
  • Basswood lace bug, also attacks lindens
  • Sycamore lace bug
  • Hackberry lace bug
  • Rhododendron lace bug, also attacks mountain laurels
  • Andromeda lace bug

    There are basically two types of lace bugs:

  • The ones that feed on deciduous trees/shrubs. The adults hibernate in winter under the leaf litter or barks of the plant. Example is the hawthorn lace bug which peak in number in early summer.
  • The ones that feed on evergreens. The eggs attach to the leaves in winter. Example is the azalea lace bug.

    Control methods are:

  • Monitor plants that feed the lace bugs
  • Lace bugs prefer sunny areas, so plant in shady areas of garden
  • Use a hard jet of water to wash off plants
  • Use natural predators like green lacewings, praying mantids, assassin bugs and ladybugs

    Gardens Alive.


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