Chemical or biological control may be possible, but has not yet been investigated for this species. European fruit lecanium, Parthenolecanium corni. These convex scales are considerably larger than San Jose or Forbes scales. They are rare in Connecticut and control usually is not required. Fall webworm , Hyphantria cunea.
Webworms damage the leaves of chestnut by both feeding and web building.
Webworms overwinter within cocoons located in protected places, such as crevices in bark or under debris and fences. Adult moths emerge in summer. Females lay white masses of 400-500 eggs on the undersides of the leaves. The caterpillars hatch in 10 days, and all from the same egg mass live together as a colony. They spin webs that enclose the leaves, usually at the end of a branch, to feed upon them.