insect

[Kelly Cassidy]

(whiteflies in greenhouse)

I hear that white flies are a persistant problem in many, if not most,
greenhouses.  One greenhouse keeper I knew said that leaving the
greenhouse open in good weather seemed to help control them.  He also
sprayed on a regular basis.  Don't know which insecticide he used.

Kelly Cassidy
Washington Cooperative Fish and Wildlife Research Unit
Mail Stop WH-10
University of Washington, Seattle