Forgive me for being a "twigger" on "tweeters", but if anyone wants to
know more about koxious weeds in WA, they can write:
Washington State Knoxious Weed Control Board
1851 South Central Pl, Suite 211
Kent,WA 98031-7507
The best control method is early detection.....and I promise I won't say
another word about plants today!
Priscill at pentec.wa.com