Lacebugs
Corythucha ciliata, C. ulmui, C. arcuata, Stephanitis sp., Kalmia sp.
Small piercing-sucking insects with distinctive netlike wing patterns that feed on the undersides of leaves. They cause characteristic yellow spotting on upper leaf surfaces and produce brown varnish-like droppings.
Identification & Symptoms
What to Look For
Potential Damage
Lifecycle
On deciduous plants, adults overwinter in bark crevices, branch crotches, or leaf litter. They emerge with spring growth and attach eggs to leaf undersides, often along midribs, sometimes with black coating. Nymphs develop quickly with 1-2 generations per season (can complete in 30 days). On evergreens, eggs overwinter on leaf undersides and hatch in May.
Professional Treatment Approach
Apply Imicide during early nymph stages for best control
Target treatments to leaf undersides where insects feed
Remove overwintering sites by cleaning up leaf litter
Monitor for early yellow spotting symptoms
Use systemic treatments with Imisol for season-long control
Maintain plant health with Arborfos to reduce susceptibility
Recommended Mauget Products
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