County's top 10 invasive weeds

June 2, 2011
previous next
Purple loosestrife: Known as "the wetland killer," this small plant clogs irrigation canals and drainage ditches. It has purple to magenta flowers with five to six petals. A visible nest of it is underneath the U.S. 2 trestle in Everett. Every year, the county releases a non-native beetle that only eats this plant. Herbicides can only be used with a permit if the weed is near water. (Snohomish County Noxious Weed Control Board)

More photo galleries

heraldnet logo