A non-chemical, organic method to kill/control ticks and other vectors using heated water is disclosed. The method causes no immediate or residual toxicity to humans, pets, beneficial insects, and wildlife, and may be employed in both residential and commercial settings. The method employs water temperatures from about 145° F. to about 155° F. to kill/control ticks and other vectors without damaging plants. The method can be adapted to higher water temperatures to kill/control unwanted vegetation that is the primary habitat for ticks and other vectors, with the least environmental impact. Delicate plants can be pre-treated using a thermally-insulated backpack. A specialized nozzle for use in the present method is also disclosed.
