You can usually see nymphs plus adult stages and cast skins. Dark, black, shiny fecal deposits will be especially evident when examining the underside of the leaves. Up to 10 individual colonies may be present on one leaf. Lacebugs injure host tissue by piercing the lower leaf surface and feeding on plant liquids.
Plants show chlorosis, foliar discoloration, reduced plant vigor and premature leaf drop.
Lacebugs are more likely to damage hosts located in sunny, exposed locations more regularly than plants on cooler, shadier sites so concentrate scouting at such locations. Use soap or oil on early season infestations to conserve natural predators. These materials must contact the insects so direct them to underside of leaves. If damage is extensive and populations are high, use Malathion, Sevin, or Orthene or one of several restricted use materials. Merit is effective but will not give immediate relief.