If injury is caused by leaf miner the browned upper and lower leaf surfaces will be completely separate when the leaf leaf is torn in two. Use Orthene when mines are first seen. Cottony-cushion scale, sweetgum scale, and walnut scale can infest the branches. Use dormant oil in the spring or control crawlers with Orthene, Sevin or malathion applied when crawlers are active. Crawler activity varies with scale species.
Tent caterpillars make nests to live in but leave the nests to feed.
Prune out nests at the tips of small branches. Do not burn the nest while it is still in the tree. Use malathion, rotenone, Orthene or Sevin. This information is for educational purposes only. References to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned.