A Simulated-Field Method of Testing Residual Insecticide Deposits Against Cockroaches1

Abstract
A method of testing residual deposits of insecticides under simulated household conditions in which the insect has a choice of contacting a treated or nontreated surface for harborage is described. Opportunity for exposure is continuous but the amount of treated surface can be varied from complete coverage to any degree desired, and the effectiveness of a compound is reported on the basis of length of time required for specific levels of mortality.

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