Answer: Michigan State University offers the following alternatives to trapping:
A) Any device that imparts a vibration into the ground
repels moles. The range of these devices is limited,
making them practical only in small areas such as a small
garden or flower bed. The more vibration the device
imparts into the ground, the more effective it will be.
B) Treatments of bulbs with 20% thiram prior to planting
will repel moles for several weeks after planting.
C) Certain plants appear to deter moles from burrowing
under them. Planted singly, they are of little use, but if
planted in a strip around the area to be protected they
seem to reduce invasion by surface tunneling. These plants
include marigolds, castor beans, fritillaria, (crown
imperial), and the mole plant or gopher purge (Euphorbia).
If you cannot find traps locally you might contact your extension office for a list of suppliers or you can order the traps online.
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