Ultra low volume (ULV) naled applications for mosquito adulticiding are a widely used control method. Naled has been registered and used for over 60 years and regulatory review processes are conducted by the United States Environmental Protection Agency (USEPA) every 15 years. In this presentation we will review findings of a modeling study using two USEPA models – AERMOD and AgDISP quantifying both deposited and suspended (at 1m breathing height) naled concentrations following a typical ULV application using a range of meteorological parameters. The modeling study showed that potential naled exposure is well below the USEPA’s Acceptable Daily Intake (ADI) even in the most extreme cases. Additionally, the results of a scoping review of published literature linking naled and dichlorvos (DDVP) – a metabolite of naled – and potential human health impacts will be discussed. The review found no evidence that ULV naled applications for mosquito control resulted in increased levels of naled in humans, provided the naled is used according to label instructions. Our findings are in congruence with EPA and CDC recommendations that aerial applications of naled, when applied according to label requirements, do not pose an adverse risk exposure to humans, wildlife, and the environment.
