Movement of German Cockroaches (Orthoptera: Blattellidae) as Influenced by Structural Features of Low-Income Apartments

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Abstract
Movements of adult Blattella germanica (L.) populations were significantly influenced by structural features of low-income apartments. Plumbing connections between adjacent apartments enhanced movement. Mark-recapture studies showed that 75% of the immigrants into a given apartment were from adjacent apartments with common plumbing. Applications of chlorpyrifos + dichlorvos at the termination of the study indicated that not all insecticides. even though containing flushing agents, increase inter apartment movement. Results suggest structural modification as a means to deter movement. The degree and frequency of movement suggests that management programs be aimed at entire structures as opposed to localized areas within buildings.