Revised July 1994. A more recent revision exists. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published September 1987. A more recent revision exists. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published September 1987. A more recent revision exists. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published September 1987. A more recent revision exists. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
The ash whitefly, Siphoninus phillyreae, an Old World species, was discovered in southern California during the summer of 1988, and it has become widespread there. Populations build to enormous numbers, and the insects may heavily infest practically every leaf of certain favored host plants.
CBT was first detected in North America during
1990 in southern British Columbia, Canada. The first
recorded U.S. contact was in far northwestern
Washington in February 1991. CBT distribution in
the Old World suggests that cold will not limit the
moth's range in Oregon. Warmer, drier areas may
inhibit its...