German Cockroach Control, 1984

This laboratory test evaluated 2 chemicals on 2 different surfaces using a modified B&G sprayer, model 104-5 mounted on a motorized track powered by a zero max 0-400 electric motor. A spraying system multi-teejet fan nozzle 800067 was attached to a nozzle stand and transported by the motorized track. The nozzle (24 inches above the panels) delivered 6.2 oz. of finished spray per minute at 10 psi at an application speed of 1.25 ft per second. Vinyl asbestos tile and enamel-painted plywood panels, 6 inches x 6 inches x 0.75 inches were sprayed on 1 side using the motorized spray unit. After spraying, the treated panels were allowed to dry for 24 h. Cockroach containment to the panel surface was accomplished by using containers (4.75 inches in diameter) with the bottoms cut out. To prevent the cockroach from climbing up the sides, the inside of the container was coated with bentonite clay. Nylon fabric was fastened over the top of the containers to prevent escape. Ten adult German cockroaches from a normal laboratory strain were placed on each panel. Control was determined at 1, 7, 14, and 21 days after treatment. Cockroach mortality was recorded 48 h after exposure to the panels. Each treatment was replicated 3 times.