Poisonous/Cautions:
No
Distribution:
Introduced
from Europe and has naturalized in forest, fields, alongs roads,
river banks, ravines thorughout southern and eastern
Ontario.
Growth
Habit:
Perennial
Method of
Propagation:
Seeds, Wind
blown, Roots/rhizome
Control:
Best time to
control is in June-July using medium to high rates of glyphosate.
2,4-D and dicamba generally less than satisfactory. Not listed on
any labels. Cutting has very little effect.
Other
Comments:
Quite common
in quarries and gravel pits and is frequently spread in this
manner. It is difficult to control in this situation. Can be a
problem in some crop situations but it has not developed to be as
serious of a problem as once thought that it might be.
