German Cockroach Control, 1976

The objective of this laboratory test was to evaluate two chemicals 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 Systems Multi-Teejet fan nozzle 800067 was attached to a nozzle stand and was transported by the motorized track. The nozzle (6” above the surface being treated) delivered 5.5 oz of finished spray per minute at 20 psi and an application speed of 2.5 ft per second. This was approximately 20 mg/sq ft of active ingredient for the formulations. Plywood panels 4” × 6” x 3/4” were sprayed on both sides using the motorized spray unit. After spraying, the treated panels were allowed to dry for 24 hours, then placed in individual battery jars 6” × 8” at intervals of 1, 7, 14, and 21 days after treatment. Ten adult German cockroaches from a normal laboratory strain were placed in each jar at the specified time following treatment. A vaseline and mineral oil solution was spread along the edge of the jars to prevent the cockroaches from escaping. Cockroach mortality was recorded after a 24 hour period. Each treatment was replicated 4 times.