Bronwyn Bishop is trying to turn her perceived weakness into a strength, telling Liberal Party preselectors that she understands the "significance of seniors" and can deliver for older Australians if she stays in Parliament.

Amid gathering talk inside the party that her support in Mackellar is collapsing, Mrs Bishop, 73, has posted out a glossy pamphlet to the 96 preselectors who will decide her fate.

Bronwyn Bishop, 73, has posted out a glossy pamphlet to the 96 preselectors who will decide her fate. Credit:Andrew Meares

"It is a fact, without support of the over 65 demographic, we cannot retain government," according to the brochure passed to Fairfax Media.

It warns that the federal election could be "only a matter of weeks away" and Mrs Bishop's "experience and track record" is more important than ever.