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Gypsy Moth/Hemlock Woolly Adelgid

Gypsy Moth image


Gypsy Moth
Caterpillar that defoliates trees

  • PSU Entomology Gypsy Moth Fact Sheet
  • APHIS Gypsy Moth page - Information on both European and Asian species
  • Gypsy Moth in North America - Information on life cycle, defoliation, spread, natural enemies, management, from Forest Service
  • Gypsy Moth Digest - Historical data on gypsy moth defoliation and suppression with maps, photo gallery, from Forest Service



Hemlock image

Hemlock Woolly Adelgid

Tiny insect causing death of hemloc trees.

  • DCNR Woolly Adelgid page - Biology, life cycle, identification, influencing factors, status in PA
  • Forest Service page - Distribution, biology, infestations, quarantines, control, biological control organisms, photo gallery
  • PSU Entomology Woolly Adelgid Fact Sheet


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