Learn to identify
plants; know your property; beware of fill dirt, hay and seed from outside
your area
Biological – No known biological control
Cultural – Good vegetative cover helps but does not prevent
establishment or spread
Mechanical – Cultivation will chop up the root system and
spread it more rapidly
Chemical – Several effective at label rates but usually requires
repeat treatment to kill extensive root systems;
refer to the
PNW Weed Management Handbook for specific chemical recommendations