In the first part of this study we monitored the development of biological control
of purple loosestrife Lythrum salicaria over a six-year period at Morgan Lake in western
Oregon. In 1992, two beetles, Galerucella pusilla and G. calmariensis (Coleoptera:
Chrysomelidae), were released to control the wetland weed at this test...
Purple loosestrife is a wetland perennial that came to the eastern seaboard of
North America in ship ballast and raw wool in the 1800's. Since coming to the
United States, it has spread across the country, forming dense monospecific stands
in wetlands. Mechanical and chemical control was expensive and ineffective,...