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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