There are three species of possums which will take up residence in houses. The Brushtail, the Ringtail and the Sugar glider. All have been found in roofs, wall cavities, linen presses and laundry cupboards.
IS IT A POSSUM?
You will need to determine what possum it is or if it is indeed a possum. Another very common invader which builds nests made from leaves in the roof and wall cavities is a Rattus rattus (Black rat). Black rats are noisy at night and you can hear them scurry across the floor. They will also chew into the wall and timber. Possums normally leave the roof after dusk and arrive back around dawn. Scats (droppings) can tell you if it is a possum or a rat!
If a caller reports a possum in the roof, the caller will need to find how it is gaining access.
A bright light in the roof will deter possums as they are nocturnal and it will also show up the point of entry e.g. loose/broken tile or hole in eaves. During the day sunlight will penetrate from the hole and the entry point should be easily found.
A thin sheetmetal collar at least 2 foot high wrapped around the trunk of a tree will stop possums from climbing and gaining access to the roof.
Trim branches near the house (at lease two metres) and along fences attached or close to the house.
Place moth balls in a sealed container with holes in the top (so they don't roll all over the floor) possums do not like the smell and hopefully with vacate the roof! Placing an 80cm diameter disc over the wire close to the house should help stop access from the power line to the house (get an electrician). Chimneys should have a thick wire grid to stop possums and birds from gaining access. If a possum is trapped in a chimney, a thick rope or knotted sheet can be placed into it - the possum can climb out at dusk and the chimney sealed. If a possum finds its way into a house at night, open the doors windows and gently coax it outside. Don't make loud noises as it will panic and climb the curtains. The higher up, the safer it feels.
This should be the last resort so make sure the house owner has organized for all points of entry to be sealed once the possum is trapped. The owner should also provide an alternative home for the possum to be placed on the property - a suitable possum box . If the point of entry is not sealed, trapping is a pointless exercise.
A possum trap must be set in a stable position and protected from domestic pets, rain, cold, wind and direct sunlight. Check the trap in the early morning (no later than 2 hours after sunrise). Once trapped the possum should be covered and located in a quiet place for release at sunset on the same day it was captured - no more than 50 metres from the capture site. (NPWS regulations).
Possums are not relocated as they are very territorial and will be killed by the resident possums. The animal can be taken into care to help the owners repair the points of entry but this should be for no more than three days -otherwise another possum will take up the vacancy. If the animal is injured it must be released back to the property in a Possum Box once it has healed.
DETERRENTS FOR PLANTS
Spray diluted dogs urine (mix I part dog urine to 2000 parts of water) around the plant not directly onto the foliage (it works) you could get a supply from your vet. Blood & bone fertilizer around the base of plants (lock the dog up - they love to roll in it), D-ter, garlic spray, citronella oil and Quassia spray along with POSSOFF have all been used so take your pick-if it works let me know! Put metal collars around fruit trees. Lock up your veggies in an aviary or place netting onto a frame around the plant.