Discovering and Exploring the Leaf-feeding Insects in Our Region

Pacific Northwest (PNW) Defoliators

Definitions and Concepts

cosmetic affecting only the appearance of the plant; not affecting the health or growth; only lasts for one growing season in deciduous plants
defoliator (on this site) insects that eat leaves
eclose become a full adult insect, leaving the pupa, the cocoon, or the paparium.
ecosystem a system formed by the interaction of a community of organisms with their environment.
exotic of foreign origin or character; not native; introduced from abroad, but not fully naturalized or acclimatized
established a: to make firm or stable b: to introduce and cause to grow and multiply
larva the immature, wingless, feeding stage of an insect that undergoes complete metamorphosis.
multiivoltine an insect having two or more life-cycles per year
native originating naturally in a particular country or region, as animals or plants.
parasitoid an insect that feeds on certain insect larvae hosts during larval development and then usually kills the host
univoltine an insect having one life-cycle per year

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