Chironex

Although untested on squirrels, I have read that mothballs (paradichlorobenzene) in an old nylon stocking will repel bats and most birds. Another repellent is nicotine sulphate. If someone tries it, please let us know if it works. I would think the mothballs would eventually evaporate, so they may need refilling periodically. I imagine panty hose, fill the each foot portion about half full and tie into a knot at the ankles. Then sling one over the top of the pstem (being careful not to obstruct new growth). Keep them close to the new growth area for maximum 'fumes' where the squirrels like to dine.

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Scot