PDC, University of Missouri - Honeylocust Honeylocust Mimosa webworm Leaflets are webbed together at the tips. The larvae feed on the upper epidermis. Leaves turn brown and entire branches are covered with brown, silken webs. See MU publication G 7251 .
New foliage is distorted.
Foliage may have yellow spots or brown areas. Dead areas may drop out, leaving holes. Carbaryl, chlorpyrifos, and cyfluthrin are labeled for control of this pest. Cankers become elongated and sunken with ridges of callus tissue. When branches are girdled, foliage beyond this point will wilt, turn yellow and die.