Just spray on tree and let tree stand in this solution instead of in water.
Best for Adults
Details
Into 1 gallon water mix 1 cup ammonium sulphate (available from
garden supply store), 1/2 cup boric acid (available from
drugstore), and 2 tablespoons borax (available from grocery or
hardware store).
Mix well. Spray on tree and let tree stand in this solution
instead of in water.