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- Cankerworms | Entomology
Spring and fall cankerworms feed on many different hosts but are most notable on elms, oaks, maples, ash, beech, hackberry, and linden trees Both species of cankerworms begin feeding at budbreak, initially causing small BB-sized holes in leaves between the veins
- Fall Cankerworm - US Forest Service
Fall cankerworm, Alsophila pometaria (Harris), is an insect that feeds on the foliage of many species of broadleaf trees It is native to North America and populations periodically build to outbreak levels that cause extensive defoliation
- What Is a Cankerworm and What Damage Do They Cause?
Cankerworms are common defoliating insects that impact trees and plants Understanding their life cycle and the damage they cause is important for managing their presence in landscapes These insects are a recurring concern due to periodic outbreaks
- Spring and fall cankerworms | UMN Extension
Cankerworms (inchworms) cause defoliation in shade trees They are found on elm, apple, hackberry, basswood, oak, boxelder, maple and ash trees as well as shrubs growing beneath heavily infested trees Young, newly transplanted, or weak trees have more chances of injury from defoliation
- Cankerworm [fact sheet] | Extension
The spring cankerworm (Paleacrita vernata) and the fall cankerworm (Alsophila pometaria) are native pests to the deciduous forest, shade, and ornamental trees of North America Periodic outbreaks of these pests cause serious defoliation
- Cankerworms | USU
Both cankerworm species are native to deciduous forests of North America, and have many natural enemies that regulate outbreak populations Typically, the cankerworm population will increase to an upper limit where it will remain for 2 to 3 years, and then decline for the same duration
- Fall Spring Cankerworms: Damage, Treatment Control | Davey Tree
Cankerworms are caterpillars of several North American moths that have wingless females Cankerworms feed on the buds and leaves of trees in early spring and can be a major pest Elm, oak apple are favorites However, wide varieties of tree species may be susceptible
- Fall Cankerworm - Penn State Extension
The fall cankerworm is a native pest of hardwood trees in North America It causes some defoliation in the forest every year, with larger outbreaks occasionally
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