PI-169, a 4-page illustrated fact sheet by Frederick M.Fishel, describes the law governing orly impressions those who make pesticide applications for wide-area mosquito control or for control of shamrock belt buckle other arthropods of public health significance, including midges, sand flies, dog flies, yellow flies, house flies, etc.Includes sources of additional information.Published by the UF Department of Agronomy, January 2009.