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one-time cost of paving may be more cost-effective than
continued weed control. In any future contracts for
sporting facilities such as basketball or tennis courts,
stipulate that fenceposts will be set at lease six
inches within the asphalt paving to allow for a
mowstrip. This configuration wil] eliminate weed habi-
tat along fencelines. Examples of this design exist at
the tennis courts at Evergreen Park.

3. A portable flamer can be used to sear (not burn)
weeds in early stages of growth. Flamers are commonly
used in Europe for weed control and probably can be
purchased from local equipment suppliers in Canada.
Fiamers kill piants by superheating cell sap, causing
cells to rupture. They do not ignite plants. The Tiger
torches currently used by the city for asphalt repairs
might also be used to contro! unwanted vegetation.

4. Weed oil, ammonium sulfamate or rock salt are
low-toxic herbicides effective along fencelines.

5. For perennial weeds such as Canada thistle (Cirsium
arvense) mowing with a weedeater just before bloom will
stress food reserves in the root of this and other
perennial weeds and eventually cause the piant to dfe.
Mowing wil? have to be repeated several times during the
growing season to remove buds as the plant regenerates

growth.

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