Control method numbers listed in the species information correspond to a
chart prepared with reference to "Control Methods for Exotic Species"
prepared by Lindsay Rodger of Point Pelee National Park. These methods are
provided as a guideline for the removal of small scale infestations of invasive
species. Large infestations may require that more drastic measures are taken to
ensure complete removal of the invasive species.
CONTROL NUMBER
TREATMENT
DETAILS
NOTES
1
hand pull
- pull each stalk at ground level
- do before seed set begins
- easier to remove root when ground is moist
- remove root or resprouting may occur
- any stems left to flower may re-seed site
2
grub up
- use spade/shovel to loosen soil and dig up root system
- re-sprouting may occur if entire root system is not removed
- may cause disturbance at site due to digging
3
shear
- cut stems close to ground level with snipper, shears, or chain saw
- many trees will sucker if not treated with herbicide
4
girdle
- remove bark and phloem layer from 10 cm band around trunk
- don't damage xylem layer, may encourage suckering
- check girdle for re-development of bark
5
herbicide foliar spray
- dispense from squirt bottle or backpack sprayer
- use caution
- spray exotic species when other species are dormant if possible
6
shear and herbicide
- cut stems with shears, chain saw
- apply herbicide from squirt bottle
- does not always eliminate suckering
- monitoring and re-treatment of sites is necessary
7
increase drainage
- grade dirt around area, create alternate water drainage paths
- may cause site disturbance
Other control methods available include controlled burning, biological
agents, integrated pest management, and mechanical harvesting. These methods are
more likely to be used for large scale infestations, though they may not be as
effective is removing the invasive species from the target area. These methods
should only be implemented with extreme caution due to the effect they may have
on personal and public safety, not to mention the effect that they may have on
the target area and surrounding habitat.
