Squirrel Repellent Plants: Peer-Reviewed Evidence Lacking

Question: Using Shot-Gun Repels-All around pool bog; squirrels still dig in pots. Cayenne/habanero pepper plants as barrier—will they work?

Answer: No Scientific Evidence for Plant Barriers

• Repellents barely work on contact (gnawing)
• "Invisible barrier" from plants = unbelievable
• ICWDM explains why repellents fail

Standard of Proof

I need peer-reviewed studies showing effectiveness. Anecdotes cancel out (for every "works" there's "what else?").