There are numerous natural substances which are said to repel possums, with varying degrees of success.
The related link below lists substances that have been tested, and a summary of the results.
possums
Possums are not blind.
Possums are eaten by snakes.
There are no possums in possum pie, as true possums are found in Australia and nearby islands, and they are protected in Australia. Possums are not the same as opossums.
Possums are mammals, and are covered with hair.
No. Sugar is not poisonous to possums.
No. Ring-tail possums are not even close to being endangered.
Possums are not eaten in modern times. In the past, the early settlers ate possums if nothing else was available. Certainly the Australian Aborigines ate possums.
In their natural state, Australian possums are external dwellers. However, brushtail possums and ringtail possums often shelter in the roof space of suburban houses.
There is no particular name for a female possum.
Monkey Repellent Machine
The predators of true possums, which live in Australia, are eagles, hawks, owls and quolls. Foxes, which have been introduced to Australia, are also predators of possums. Possums should not be confused with opossums, which live in North America, and are not related to possums.