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Pesticide Discharge Management Plan

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Pesticide Discharge Management Plan Pesticide Discharge Management Plan 1. PDMP Team a. Person(s) responsible for managing pests in relation to pest management area: All operational and biological support staff along with the Director of Mosquito Management Services (Wade Brennan, 5531 Pinkney Ave. Sarasota, FL. 34233) b. Person(s) responsible for developing and revising PDMP John Eaton, Operations Supervisor, and Wade Brennan Environmental Scientist III, are the individuals responsible for monitoring changes in Federal and State regulatory agencies that govern mosquito control operations. c. John Eaton, and Wade Brennan, are the individuals responsible for developing, revising and implementing corrective actions and other effluent requirements d. Person(s) responsible for pesticide applications Persons (supervisors and above) who direct applicators these include: All Operational staff employed by Sarasota County Mosquito Management Services that hold a Public Health Pest Control License administered by Florida Department of Agriculture and Consumer Services are directly responsible for pesticide applications (because they can oversee uncertified applicators) additionally, Sarasota County’s awarded Contractors must have required state certification (s). 2. Pest Management Area Description Overview Sarasota County Mosquito Management Services (SCMMS) has been mitigating pestiferous nuisance host seeking mosquitoes of public health importance for over 60 years. A total of forty- four mosquito species are found in Sarasota County of which a dozen are in need of management through a typical peak mosquito season, April through November. When intervention action plans are developed and implemented more than one species is usually involved. Past and current mitigation strategies for both larval and adult mosquitoes have always been in full compliance with FIFRA conditions which have met water quality standards. All action plans have been developed to minimize pesticide delivery into the environment and especially the waters of the US, be it a pond, wetland or discrete conveyance. With the absence of mosquito control, Sarasota County residents and visitors would see a major decrease in the quality of life (recreational activities e.g., swimming, hiking, biking and fishing) and an increase public health risk to the citizenry, livestock, and pets within our jurisdictional boundaries. Sarasota county residents and visitors generate approximately 2000 service calls per year for some form of mosquito intervention action. Six hundred of the 650 square miles in Sarasota County are under active SCMMS management. Permits for spraying within Oscar Scherer State Park and Myakka State Park Arthropod Management Plans) are limited to times of medical alerts caused by mosquitoes that transmit disease (388.4111 F.S. and 5E-13.042(4)(b) F.A.C.). Sarasota County is composed of a number of land use environments (e.g.; residential urban, agricultural) including plant communities that produce different mosquito species that require different mitigation efforts. i. Sylvatic sites -swamps, salt & freshwater marshes, woodland pools, flooded fields/pastures, storm water retention ponds, tree holes, etc. ii. Urban sites -freshwater swamps, flower pots, stagnant bird baths, tires, trash containers holding water, gutters, tree holes, septic ditches, roadside ditches, lawn swales, non- functional swimming pools, residential residual swamps, mitigation areas, street catch basins, junk yards, depressions in tarp covers, etc. Upland Habitats. Upland areas have pine flatwoods, wet and dry prairies and various hammocks along with agricultural lands consisting of cattle, sod farms and truck crops. These communities are typically east of Interstate 75 and run north to south in Sarasota County with a more western extension as one approaches North Port and Englewood. The T. Mabry Carlton Jr. Memorial Reserve area, which we do not treat, borders much of these areas. The soils of these communities retain huge “seed banks” of floodwater mosquito eggs and when flooded the eggs hatch and develop quickly during the summer months; hatching from egg to adult in five days is not uncommon. The major floodwater mosquito species within these areas are Psorophora columbiae and Aedes infirmatus. Two species of Mansonia are associated with invasive emergent vegetation (water lettuce and water hyacinth) throughout Sarasota County ponds, ditches and canals and typically have two or three concurrent emergences with the floodwater species. Urban Habitats. In urban areas of Sarasota County we have a number of vegetative community “islands” of the freshwater wetlands, both wooded swamp types and thickets. These plant communities, in many instances, are relics from more extensive drainage areas eliminated by urban development of the past. They are our “residual residential swamps” discussed above in the Sarasota County Mosquito Management IPM plan. The problematic mosquito species from these areas that need action plans are quite diverse. The species are: Aedes atlanticus, Aedes infirmatus, Aedes taeniorhynchus, Anopheles crucians, Culex nigripalpus, Coquellitttidia perturbans, Mansonia species, Psorophora species, including Ps. columbiae. The urban areas also contain many ponds, ditches and in some areas marshes. Two species of Mansonia are associated with invasive emergent vegetation (water lettuce and water hyacinth) throughout the aforementioned urban environs and typically have two or three concurrent emergences with the floodwater species. Artificial habitats such as buckets, bird baths and tires support domestic mosquito development and are scattered throughout the urban communities. The two most problematic mosquito species are Aedes albopictus and A. aegypti. SCMMS manually monitors larval populations and stages with larval sample collections (species identification and number) collected by dippers for characterization of larval habitats to assess the larval population size that could contribute to unacceptable adult mosquito populations. Surveillance by our larval inspections helps determine the larval control strategy that is appropriate within resource constraints. Coastal Habitats. Coastal areas include estuarine edges, mangrove swamps and barrier islands. Approaching the coast, Sarasota plant communities enter the brackish-saltwater wetlands (estuarine edges) along with black and white mangrove swamps, depressions within black needlerush and bulrush sites, and the intercoastal spoil islands with its tidal influence. It is with this tidal influence and rainfall events that another set of mosquito problems arise. These problem sites are generally more inland, past the mean high tide level. As the tide recedes the flood waters do not flush out nor are native fish species able to migrate into these areas. Lacking predators, these unconnected waters produce large populations of larvae. These sites, when initially flooded, are the larval developmental sites for the State of Florida’s top two mosquito pest species Aedes taeniorhynchus and the brackish floodwater species Aedes sollicitans. a) Pest Problem description The attached table indicates the major species of concern in Sarasota County. Species listed are delineated by control measures taken and disease risk. Species are identified using Keys to the adult females and fourth instar larvae of the mosquitoes of Florida (Diptera, Culicidae). Technical Bulletin of the Florida Mosquito Control Association, Vol. 1 (revised 2000). Table I. Sarasota Mosquito Species of Concern Mosquito Species Larviciding Habitat Aerial Truck Hand Held Known vectors efforts mitigation Adulticide Adulticide adulticide of disease efforts transmission Aedes aegypti x x X x x Aedes albopictus x x X x x Aedes atlanticus x X X x x Aedes infirmatus x X X x Aedes x X X x taeniorhynchus Aedes sollicitans x X X x Aedes vexans x X X x Anopheles x X X x crucians Anopheles x X X x quadrimaculatus Coquillettidia x X X x x perturbans Culiseta melanura x x x Culex nigripalpus x X X x Culex salinarius x X X x Mansonia dyari x x X X Mansonia titillans x x X X x Psorophora ferox x X X x Psorophora x X X x ciliata/howardii Psorophora x X X x columbiae Individual pest problems descriptions: Aedes aegypti is a common, peridomestic mosquito that bites during the day and prefers to bite humans rather than other mammals or birds. This species is strongly associated with humans and readily develops in artificial containers (buckets etc.) throughout Florida. It is a frequent pest inside and outside houses. This is an important species not only as a nuisance pest but is the major vector of yellow fever and dengue to humans in the Caribbean, South America, and now Miami-Dade and Monroe Counties in Florida. Aedes albopictus is a common, peridomestic mosquito that bites during the day and prefers to bite humans rather than other mammals or birds. This species is more aggressive than the related species Aedes aegypti. This species is strongly associated with humans and readily develops in artificial containers (buckets etc.) throughout Florida. It is a frequent pest inside and outside houses. This is an important species not only as a nuisance pest but is the major vector of dengue to humans in Asia, and currently thought to be of secondary importance with possible locally acquired dengue transmission now present in Miami-Dade and Monroe Counties in Florida. Aedes atlanticus is a common mosquito species that as larvae develop in shaded, woodland pools and can be a severe biter during the day in and near woodland
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