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Florida Department of Agriculture and Consumer Services

Florida Department of Agriculture and Consumer Services. Charles H. Bronson. COMMISSIONER. Mosquito Control in the CDD. Celebration Development District May 11, 2009. Discussion Topics. Reasons for Mosquito Control Basic Biology Methods of Mosquito Control

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Florida Department of Agriculture and Consumer Services

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  1. Florida Department of Agriculture and Consumer Services Charles H. Bronson COMMISSIONER Mosquito Control in the CDD Celebration Development District May 11, 2009

  2. Discussion Topics • Reasons for Mosquito Control • Basic Biology • Methods of Mosquito Control • Surveillance: Key to Mosquito Control • Mosquito Control in Celebration

  3. Reasons for Mosquito Control Disease Control • Dengue • West Nile Virus • St. Louis Encephalitis • Eastern Equine Encephalitis • Malaria

  4. Reasons for Mosquito Control Disease Control • Malaria • 3.2 billion people in 107 countries at risk of malaria • 350 – 500 million clinical episodes/yr • 1 million deaths/yr • Encephalitis • Costs 20K to 3 million for long term care

  5. Reasons for Mosquito Control • Quality of Life • Mosquito attacks significantly reduce ability to enjoy outdoors – reduces recreational activity, tourism, etc.

  6. Mosquito – Basic Biology Insects – Diptera Approximately 200 species in U.S. • Two wings, wings have scales. • Female mosquitoes' mouthparts form a long piercing-sucking proboscis. • Males have feathery antennae and mouthparts not suitable for piercing skin. • A mosquito's principal food is nectar or similar sugar source.

  7. Mosquito – Basic Biology Female mosquitoes – take a blood meal for egg production Four stage life cycle Adapted for marginal environments Adapted for rapid increase in numbers Quickly overwhelm other predators

  8. Mosquito – Basic Biology • Species vary in: • Preferred habitat • Preferred egg laying sites • Host Range • Times of peak activity • Preferred harborage • Ability (competence) to transmit disease • Results in – variability in control method effectiveness

  9. Mosquito Species of Concern Ades taeniorhynchus Aedes aeqyptii Aedes sollicitans Ades albopictus Ades vexans Culex nigripalpusCulex quinquifasciatusCoquillattidia perterbans* Psorophora columbiae

  10. Methods of Mosquito Control Source reduction • Larvaciding • ` Adulticiding

  11. Methods of Mosquito Control Source reduction disrupts life cycle: • Prevent egg laying and development • Empty water receptacles • Drain standing water • Clean gutters • Abandoned cisterns?

  12. Methods of Mosquito Control Larviciding • Aerial • Liquid or Granular Ground Based Truck or Hand

  13. Methods of Mosquito Control Larvicides

  14. Methods of Mosquito Control Adulticiding Ground Based: Aerial: Truck, Hand Thermal, ULV

  15. Methods of Mosquito Control Adulticides

  16. Methods of Mosquito Control ULV – truck or aircraft High Pressure systems

  17. Methods of Mosquito Control • Adulticiding • Droplet size of application important! • Too small – will not reach target • Too large – will fall out • Ideal = 15-20 microns – impacts mosquitoes

  18. Methods of Mosquito Control • Adulticiding “Timing of Application” • Must be done when adults mosquitoes active • Usually dusk/dawn/night • Avoid times/places bees are active • Aquaculture

  19. Methods of Mosquito Control • Biological Controls • Bats • Birds (Blue Marlin) • Insect Predators • Mosquito Fish (Gambusia)

  20. Methods of Mosquito Control What is the Basis of Successful Mosquito Control? Surveillance!

  21. Mosquito Control Surveillance Surveillance - Defines nature and extent of problem (numbers and species) • Basis for determining when/how to treat • Used to determine efficacy/need for retreatment • Chapter 5E-13, FAC changed to require surveillance to justify spraying

  22. Techniques: Telephone requests “Battle is already lost” Reflects only actively biting adults Calls need to be logged in and mapped (identified) Over time a historical record can be developed Mosquito Control Surveillance

  23. Mosquito Control Surveillance Techniques: • Landing rate counts • Record number per minute • What number justifies spraying? • No-repellant can be worn! • Ethical issues – worker exposure to disease carrying mosquitoes

  24. Mosquito Control Surveillance Techniques: • Trapping • Light traps – CDC & New Jersey • Baited (CO2 or octenol) • Un-baited • Location important! • Truck traps • Suction traps

  25. Mosquito Control Surveillance Trapping • Traps collected daily or several times per week • Adult mosquitoes “speciated” (ID) & counted • Data logged and mapped

  26. Mosquito Control Surveillance Techniques: • Larval/Pupal Stages • Inventory potential sites • Visually inspect when weather conditions permit • Dip cups • ID species on site • Record stage of development and number per dip • Data logged and mapped

  27. Mosquito Control in the CDD

  28. Mosquito Control in Celebration Why do you need mosquito control in CDD?

  29. Osceola County MCD BioMist 31 + 66 (permethrin) Total of 8 applications Rate 0.00148 lbs/ac Treated CDD as one unit Clarke Mosquito Control BioMist 4 + 4 (permethrin) Total of 719 applications Rate 0.00175 lbs/ac Partitioned CDD into Treatment Zones Mosquito Control in Celebration Treatments Performed in CDD in 2008 Maximum Label Rate = 0.18 lbs/ac/yr Cannot exceed 102 applications/yr

  30. Mosquito Control in Celebration • Osceola County MCD Applications in 2008

  31. Mosquito Control in Celebration Clarke Mosquito Control Applications • Used two products alternately • Anvil 10+10 (Sumethrin + PBO) • BioMist 4+4 (Permethrin + PBO) • Divide CDD into 9 Treatment Zones

  32. Mosquito Control in Celebration

  33. Mosquito Control in Celebration • Clarke Mosquito Control Applications in 2008

  34. Mosquito Control in Celebration

  35. Mosquito Control in Celebration Applications to Zone 7: • Maximum rate for permethrin applications is 0.180 lbs/ac/yr • Maximum rate for permethrin was exceeded by 1.7% • (0.0033lbs/ac ÷ 0.18 lbs/ac max label rate X 100%) • (0.0033 lbs/ac ≈ 1.5 grams (paperclip)) • Maximum number of applications was exceeded (max number of applications is 102; 106 were made) • Exceeding maximum label rate and number due to lack of coordination between OMCD and CDD

  36. Mosquito Control in Celebration Summary Recommendations for CDD • Coordinate applications in CDD with OMCD • OMCD downsized MC operations • Contracted with Clarke MC to handle applications • Ms. Sherry Burroughs appointed as Director of OMCD

  37. Mosquito Control in Celebration Summary Recommendations for CDD • Train a member(s) of the CDD Board of Directors in MC • Assist/direct contractor spray missions • Act as liaison to OMCD • Act as liaison to CDD citizens • Publish information (monthly?) for CDD citizens (IPM)

  38. Mosquito Control in Celebration Summary Recommendations for CDD • Develop standard treatment protocols agreeable to citizens of CDD • Develop standardized criteria for surveillance • Landing rate counts • Trapping (locations, numbers needed to treat) • Mosquito identification (“speciate”) • Monitor disease vectors

  39. Discussion / Questions

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