Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Distribution, biology, and control of hound's-tongue in British Columbia.

Abstract

A discussion is presented of these aspects of hound's-tongue (Cynoglossum officinale), a weed that is particularly problematic to cattle producers as it bears large quantities of burred nutlets (which attach to cattle hair and create problems for the marketing of such animals) and also contains up to 2.1% of pyrrolizidine alkaloids (which have been responsible for several cattle poisoning incidents when the weed has contaminated feeding hay). The use of 0.56-1.12 kg/ha picloram spray is advocated for the control of hound's-tongue along roadsides, in waste areas and small plots of grassland, but if the weed is located close to forests other control strategies should be used.