Efficacy of Orthene and Super Hydro-Sol for German Cockroach Control, 1987

Abstract

Abstract Comparative laboratory tests were initiated to determine the relative efficacy and residual life of Orthene PCO Formula II (96% acephate) and Orthene PCO Formula II plus Super Hydro- Sol (Grillocin®, an odor neutralizer) against the German cockroach. Identical Orthene solutions were prepared at 1% AI; to one of these the deoderant Super Hydro-Sol was added at the rate of 1.5 oz/gal. Spray dilutions were applied to 1-sq-ft (929 cm2) tempered masonite panels at the rate of 1 gal/1000 sq ft (3.78 ml/929 cm2) using a mechanized spray tower apparatus equipped with a stainless steel nozzle tip, Spraying Systems Tee-Jet 8001E, at a constant pressure of 25 psi. After treatment, panels were placed into vertical storage compartments (dark conditions) for residual aging. Residual agings evaluated were 1, 14, 30, and 60 days. At the appropriate aging period, test insects were confined (continuous exposure) to the treated panel using 12.7-cm-diam plastic rings, lightly greased with a petrolatum-mineral oil mixture. Exposure times evaluated were 30 min and 1, 2, and 4 h. After exposure, insects were removed from the treated panel and placed in untreated holding jars, with food and water provided, for 48 h. Morbidity counts were recorded at the end of the exposure period and at 24 and 48 h after the start of the exposure; the final morbidity 48 h after the exposure is reported here. Six replicates were conducted for each exposure time, at each aging period, for each insecticide treatment. Each replication consisted of 10 cockroaches—5 adult males and 5 adult nongravid females.