WEED MANAGEMENT PLAN - City of Kelowna

are present, cut and bag plants and take to the landfill for burial. Check clothing, pets and
equipment before leaving an infested area.
iii. Japanese knotweed - Chop stems near the base and cover them with thick, black plastic and
mulch. Caution: Stem cutting without follow-up can increase lateral spread and stem density.
iv. Scentless chamomile – Handpull or dig small infestations. Cut or mow before flowering to prevent
seed production. Mowing will be effective only if stands are mowed early and often, with each
successive mowing lower than the previous. Bag seeded stalks and take to the landfill for burial.
v. Spotted knapweed - Handpull small infestations. Plants must be pulled for several years to deplete
the seed bank. Cut plants in the early flower stage; plants are less likely to re-sprout if allowed to
bolt before cutting. Bag seeded plants and take to the landfill for burial.
vi. Tansy ragwort – Handpull small infestations. Cut plants just before flowering when root reserves
are low, but before seed production. Bag flowering or seeded plants and take to the landfill for
burial.
Priority B Invasive Plants
Priority B Invasive Plants should be eradicated within designated priority areas as a means to contain or
limit their spread throughout the greater management area.
i. Common burdock – Pull or dig plants ensuring that the first few inches of roots are removed to
prevent re-growth. Second year plants may be cut close to the ground after bolting, but before seed
production. At this life stage, it is unnecessary to remove the root of burdock. If burs are present,
cut and bag plants and take to the landfill for burial. Check clothing, pets and equipment before
leaving and infested area.
ii. Dalmatian toadflax – Handpull or dig small infestations. Handpulling is most successful where
soils are sandy and/or moist, allowing for removal of as much root as possible. Physical removal
must be repeated annually for at least ten years to completely deplete the seed bank. Hand-cutting
toadflax stands to ground level in spring or early summer is an effective way to eliminate seed
production and dispersal, but it will not destroy plants. Cut and bag seeded plants and take to the
landfill for burial.
iii. Diffuse knapweed – Handpull small infestations. Plants must be pulled for several years to deplete
the seed bank. Cut plant in the early flower stage; plants are less likely to re-sprout if allowed to
bolt before cutting. Cut and bag seeded plants and take to the landfill for burial. Release biological
control agents, Larinus minutus and Cyphocleonus achates for large dense infestations (see Figure
14).
iv. Hoary alyssum - Handpull or hoe small infestations. Cut or mow before flowering to prevent seed
production. Cut and bag seeded plants and take to the landfill for burial.
v. St. John’s-wort – Handpull or cut small infestations. Cut and bag seeded plants and take to the
landfill for burial. Release Chrysolina beetles for large dense infestations (see Figure 14).
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Post-fire Invasive Plant Management Plan for the City of Kelowna
Eco-Matters Consulting
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