Mark-recapture studies were conducted in two fields to monitor interplot movement of boll weevils as well as dispersal from the field. Movement between the 6-row plots was considerable before application of insecticides, defoliants, and their combinations. However, interplot movement after treatment was not detectable, and we conclude that such movement was not an important factor impinging on the chemical efficacy results, which are reported elsewhere. Dispersal out of the field was high, both before and after chemical application. A considerable portion of those weevils dispersing were recovered in flanking trap rows of late-planted okra-leaf cotton. However, only an extremely small proportion of dispersing weevils were captured in surrounding pheromone traps.