CHESAPEAKE S AERIAL LARVICIDING PROGRAM

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1 CHESAPEAKE S AERIAL LARVICIDING PROGRAM WE ALSO DO AERIAL ADULTICIDE APPLICATIONS WHEN NECESSARY Presented by Kirby Foley, Operations Director/Biologist

2 CHESAPEAKE SPRING AERIAL LARVICIDE

3 AERIAL LARVICIDING PROGRAM PURPOSE AND GOALS PRE-APPLICATION ACTIVITIES APPLICATION POST APPLICATION ACTIVITIES RESULTS

4 PURPOSE OF LIQUID LARVICIDE APPLICATION To treat areas that are extremely hard to access Treat large areas in short period of time Liquid treatment is cheaper than granular Target early broods of certain species

5 OUR GOAL To kill the first broods of several species To reduce the potential for disease and nuisance

6 PRE-APPLICATION ACTIVITIES Aerial surveys to determine target areas Larval surveillance to determine species and population density GIS provided maps of target areas

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12 Culiseta melanura A primary target species Early Spring and abundant throughout the year The enzootic vector of EEE and a vector of WNV

13 Culiseta melanura

14 Ochlerotatus canadensis Another primary target Very abundant in Spring and may be in the Fall A vector of both EEE and WNV Can be a bridge vector to humans and horses Big nuisance very aggressive biter

15 Ochlerotatus canadensis

16 OTHER TARGET SPECIES Any species that are present in target area and actively feeding In 2012 multiple species were killed Anopheles, Culex, and Aedes vexans

17 PRE-APPLICATION Calibrate aircraft for swath width and flow rate

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25 LIQUID AERIAL LARVICIDE REQUIRES Pre-application dipping Application before leaves and canopy develop Weather: Warm enough for larvae to actively feed Deliver chemical to target Post-application dipping

26 2004 and was our first year. We used Vectobac 12AS We used a fixed wing and a helicopter We did 14,759 acres at a cost of about $150, our second year. We used a liquid duplex of Vectobac 12AS and Altosid SR-5 We used a fixed wing and a helicopter We did 14,112 acres at a cost of about $150,000

27 2004 and 2005

28 2006 and We did not do liquid larvicide application. We did a granular application to 1,312 acres by fixed wing We used Vectobac CG and Altosid XRG because leaves were fully developed July 25th Cq. perturbans 2007 conditions not great for liquid larvicide again. It was either too dry or larvae count was too low We used the liquid duplex on April 5 th The application was by fixed wing on 4,732 acres

29 2006 and 2007

30 2008 and We did the liquid duplex in early April. We applied the liquid duplex to 10,780 acres We treated an additional 5,947 acres with granules in May Both applications made by helicopter 2009 We treated 13,172 acres in early April. The liquid duplex was made up of Vectobac 12AS and Altosid SR-20 Application made by helicopter

31 2008, 2009 and 2010

32 We treated 12,831 acres by helicopter. The liquid duplex was made up of 16oz. Teknar, 0.25oz of Altosid SR20, and 15.75oz of water per acre The treatment was very successful high 90% 2011 We treated 12,669 acres by helicopter The liquid duplex was a mixture of 12oz Vectobac 12AS, 0.25 oz of Altosid SR20, and 19.75oz of water per acre The treatment was very successful high 90%

33 2011 and 2012

34 March 22 25, was the perfect year for our liquid larvicide application. The target habitat was wet, plenty of larvae, and the leaves were not yet developed We had four days of sunshine and low wind Pre application dipping: Average 5 to 20 per dip Post application dipping: Averaged 0 to maybe 2 per dip Very successful treatment: High 90 to near 100% We treated 11,430 acres by helicopter for $109,842.00

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36 DURING APPLICATION Biology Department conducted test for quality assurance To assure that the proper quantity of larvicide reached the water

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47 SUMMARY Our aerial program has evolved into very efficient exercise We get in the high 90 s to very near 100%

48 Acknowledgements Chesapeake Mosquito Control Commissioners Joe Simmons, Director Lisa Wagenbrenner, Biologist and Connie Gregg, Biology Tech Jason Pevear, GIS Analyst District Supervisors Allen Peoples, Robert Whitaker, Leroy Bohn, and their crews Gene Payne, Past Director Jason Williams, Past Biologist Chemical Salesmen: Charles Pate, Ted Bean, Jim Andrews, and Jeff Hottenstein. Gene Kritter, Pilot