Find out about pretentative measures which can be taken, as well as symptoms of poisoning. Includes purple loosestrife, scotch broom, Bush honeysuckle, and privet. Includes a photo and description of the plant. Also explains why they are a problem. International Survey of Herbicide-Resistant Weeds Learn about the emergence of herbicide resistant weeds world wide.
Site lists common names, species name, country and mode of action for resistant weed species.
There is also a classification of 130 different herbicides. Site also allows registration of new occurrences of resistant weeds. This society exists to deal with weed science issues of global importance. Find out about the society's activities, journal, and newsletter. Iowa State University Extension Weed Management ISU Extension has lots of great information on weed management.