possum eradication

You need more automobile traffic. When we moved into our house in 1976, possums (also raccoons, which made pests of themselves getting into the garbage cans) were to be seen all the time. However, since possums are extremely stupid, like squirrels, they were always getting run over in the streets, so that I haven't seen one for the last 15 years or so. The raccoons went the same way, but there are still plenty of squirrels; they must be much more prolific.