Published February 2002. Facts and recommendations in this publication may no longer be valid. This publication was replaced by Pacific Northwest Extension publication PNW 639 in November 2012. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Declared out of date June 2009. 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