The invention is an animal repellant composition containing one or more plant
derived toxins, including for example one or more alkaloids isolated from for example,
one or more members of the family Narcissus, and optionally containing one
or more polymers, including for example one or more bioerodible polymers and/or
more non-absorbable polymers. The animal repellant composition is useful for repelling
animals from vegetation and for rendering vegetation unpalatable to animals. The
invention also includes methods for repelling animals, as well as methods for treating
vegetation to render the vegetation unpalatable to animals, such animals including
for example, deer, voles, moles, ground hogs, mice, rats, rodents, raccoons, nematodes,
larvae, worms, fungi, molds, bacteria, vegetative organisms, and insects. A suberin-polymer-repellant
chemical complex and a method for treating damaged vegetation are also disclosed.