The Division of Mosquito Control, now a division of the Department of Planning & Public Works but originally organized in 1928 as the Morris County Extermination Commission, carries on a program of Integrated Pest Management including inspections, biological controls, water management and public education, coordinated with the DEP and health agencies.

We are a comprehensive, modern, integrated mosquito control program that employs a variety of environmentally sound techniques to reduce the annoyance and threat of disease caused by this important insect. The Morris County Board of Chosen Freeholders takes the work of mosquito control seriously and funds a program that provides a high level of protection from mosquitoes for the residents of Morris County.

Operating Philosophy

The Division of Mosquito Control has the goal of reducing the number of nuisance and disease transmitting mosquitoes within the County. It employs a number of techniques to provide this service to residents with minimal impact on the environment. The program conducts extensive monitoring (mosquito surveillance) to determine the number and types (species) of mosquitoes present before any work is carried out.

A progressive system of control tactics are employed to reduce mosquito numbers. Water Management decreases the time surface water is present so that larval (immature) mosquitoes cannot complete their development. If larvae are found, they are controlled with biorational products (biological agents specific to mosquitoes) or mosquitofish where appropriate. The control products are put out by hand equipment, light ground equipment or helicopter. If adult mosquitoes become abundant despite these other techniques, we may apply insecticides from truck mounted sprayers, at very low rates (½ – 1 ounce per acre). These products are used only as a last resort and break down rapidly after application.

New techniques and monitoring systems are always being tested to improve our operations. Novel disease surveillance methods will be undertaken to watch for West Nile virus, a new disease in the United States that is transmitted by common house mosquito. The employees of the Division will continue working to serve the public with the best possible mosquito control they can offer.