View our dedicated website for THORNY DEVIL – POSSUM SPIKES
For an effective possum solution.
Use Thorny Devil Spiked Fence Capping as an effective CARRIER for a paste of naphthalene and petroleum jelly, which can be applied as a bead between the rows of spikes, onto the plastic material.
Thorny Devil fence capping is an essential element of an integrated deterrent solution. This is because, although possums can move slowly along the capping, they need to walk with their toes between the spikes and therefore in the repellant paste.
They do not like naphthalene at all and the spikes and PVC material of the fence capping keeps the solution from soaking into the fence material.
Naphthalene flakes will dissolve into petroleum jelly at approx. 75 degrees (or they can be crushed into the jelly using a mortar an pestle) Suggested ratio of 1 Naphthalene to 5 Petroleum Jelly. The petroleum jelly is a waterproof medium which helps the naphthalene to last longer and be more effective. The paste should be applied every 3 weeks, or so, until the possum’s habits are broken (and is probably only need during the flowering/fruiting season).
If the repellent paste is applied in a reasonably thick bead (3-4mm) and left, the surface will lose most of its smell after a few days.
It is only when disturbed by a possum or cat that the naphthalene suspended in the paste will be activated and the animal will then have the mixture on its feet.
Note: Be sure to keep the mixture away from children (Naphthalene is toxic).