Outbreak-pest
Guides
Alsophila
cankerworm moths
Alsophila is a genus of moths in the family Geometridae, subfamily Alsophilinae. The genus is characterized by extreme sexual dimorphism: males are winged and capable of flight, while females are wingless, flightless, and lack functional mouthparts. Adults are active in late autumn or early spring, with larvae (known as inchworms or loopers) feeding on hardwood tree foliage in spring. Several species are significant defoliators of shade trees, with populations exhibiting eruptive dynamics.
Dryocampa
rosy maple moths
Dryocampa is a genus of small saturniid moths native to North America, containing approximately seven described species. The genus is best known for Dryocampa rubicunda, the rosy maple moth, recognized by its distinctive pink and yellow coloration. Larvae of this genus feed on maple trees (Acer species), with some species occasionally reaching outbreak densities that cause noticeable defoliation. Adults are typically nocturnal and possess reduced mouthparts, not feeding as adults.