Abstract: A liquid insecticide solution comprising a 5% to 20% water solution of a disodium octaborate tetrahydrate (“DOT”) mixture comprising disodium octaborate tetrahydrate, colored pigment, and a bittering agent of either sucrose octa-acetate and denatonium benzoate, is provided. Preferably, the insecticide solution is prepared by stirring a powdered DOT mixture into water. Methods for treating wood surfaces and preparing bait stations with liquid insecticide solutions prepared with D.O.T. mixtures are also provided.

Abstract: A liquid insecticide applicator in the form of a trigger pump having a detachable, semirigid, tubular extended nozzle press fit into a recess within a nipple along the discharge end of the pump assembly is provided. When the extended nozzle is engaged to the pump assembly, the applicator is suitable for applying or injecting insecticides such as solutions of containing disodium octaborate tetrahydrate (D.O.T.) into holes or wall voids. When the extended nozzle is disengaged from the pump assembly, the applicator can deliver contents in a spray, suitable for treating larger surfaces, such as large areas of exposed wood. Preferably, the liquid insecticide solution used with the applicator is a 5% to 20% water solution of a DOT mixture comprising disodium octaborate tetrahydrate, colored pigment, and a bittering agent of either sucrose octa-acetate or denatonium benzoate.