Bonide Wilt Stop Plant Protector QT. Concentrate is a natural, non-toxic product, derived from the resin of pine trees, has the unique ability to form a soft, clear flexible film on treated plants. This film protects plants from drying out, drought, wind burn, sunscald, winter kill, transplant shock and salt damage. WILT STOP also extends life of cut flowers and Christmas trees. Great for use year around on deciduous trees, evergreens, shrubs, roses, transplants, vegetables, fruit--- Concentrate-25% Pinene.