These objectives will be addressed through a prospective, randomized controlled, multi-site intervention trial in which 414 eligible children age 5 to 14 years who live in households with a confirmed trap count of 30 or more cockroaches over a 3-day period, are randomly assigned to one of two treatment groups. Treatment will be implemented at multiple intervals in the homes of children assigned to the intervention group. Children in both the intervention and control groups will receive clinical evaluations for asthma, home assessments of allergen exposures, educational materials on allergen exposures and asthma, and information on study results. Following 12-months of active data collection, the extermination treatment will be made available to the homes of children in the control group. The target sample size is 372 participants completing the study, equally divided into the two arms. Home environmental assessments following the enrollment visit will take place at enrollment, 1, 3, 6, 9, and 12 months. Clinical assessments will also be conducted in the home at enrollment and the 12-month visit. Primary outcome data will be collected during scheduled follow up phone calls every two months.