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Bill Reynolds Speaks at the American Pesticide Control Officials Conference

The 2018 Association of American Pesticide Control Officials Annual Conference (AAPCO) was held in Alexandria, Virginia on March 4th-7th 2018.  Leading Edge’s President & CEO, Bill Reynolds, was an invited speaker and was asked to present and share his knowledge and expertise regarding the use of UAS for vector control and crop protection.  The Association looks forward to working with Bill Reynolds and Leading Edge as they address pesticide and regulatory management issues in individual states specific to UAS application technologies.

Leading Edge Associates would like to thank AAPCO for their invitation and opportunity to present at the conference.  Collaborating with all stakeholders to assure a seamless and successful integration of UAS for aerial applications is a winning strategic partnership.

To learn more about the Association of American Pesticide Control Officials, visit https://aapco.org.

New MapVision Customer: Lee County Mosquito Control District

On January 8th and 9th, 2018 Leading Edge welcomed Lee County Mosquito Control District to their newly created, customized MapVision Enterprise systemLeading Edge provided on-site training and preparation for the live, enterprise-wide launch scheduled for late January. Over the course of the project, Lee County provided great feedback, spent time working with their MapVision Enterprise website, new MapVision Tough-book App for inspectors and two newly created iPhone apps for adult trapping and larval inspection!

Other great features built into Lee County’s MapVision include:

  • Aerial workflows and flight logs
  • Aerial and ground adulticiding and larviciding workflows
  • Truck trapping feature with baseline management tool
  • New real time dashboard with key performance data
  • Integration with their phone system for outbound notification calls to the public
  • Advanced surveillance and lab workflows
  • Back-check inspection workflow
  • Sentinel and flock management system
Additionally, Leading Edge created many customized features, workflow, reports and have integrated our powerful business intelligence reporting tool!

Our sincere thanks to Lee County and the team who worked so diligently with Leading Edge to create a terrific system! 

If you are interested in learning more about Leading Edge’s MapVision Enterprise system, please contact Bill Reynolds at breynolds@leateam.com or call at 407-468-0008.

Lee County Mosquito Control Districts’ inspectors are trained on their new MapVision Enterprise system, MapVision Tough-book app and iPhone Trapping/Inspection app.







Working through numerous features of the new iPhone Inspection and Treatment app.

Inspectors learn about the numerous features of the MapVision Tough-book app for field use.


This is an image of the MapVision iPhone app displaying permanent traps in various stages. Red indicating a trap ready for collection.

The MapVision iPhone Inspection app provides technicians the ability to load inspection locations and enter vital field data which uploads to the MapVision Enterprise server in real time.











2017 FMCA Commissioners’ Session

The Florida Mosquito Control Association’s annual meeting was to be held at Hawks Cay Resort in Duck Key, Florida on November 13, 2017. Unfortunately, Hawks Cay Resort was closed due to Hurricane Irma’s destruction in the Florida Keys, leaving the FMCA Annual meeting without a facility to host the meeting.  The FMCA Executive Board did an incredible job relocating the annual meeting to the Gaylord Palms Hotel in Kissimmee Florida in less than 45 days.


Andrea Leal, Director of The Florida Keys Mosquito Control District and Bill Reynolds of Leading Edge Associates, were invited to speak at the Commissioner’s Session on Thursday November 16th about the current and future use of drones in mosquito control.  Andrea shared their experiences with using drones in the Florida Keys for aerial surveillance and presented the time saved by rapidly identifying the presence of water in remote breeding sites.  To reach these remote locations would take 1-1.5 hours on foot, only to discover the potential breeding sites were dry.


Bill Reynolds discussed the operational use of drones for surveillance, multispectral imagery and aerial applications of larvacides, both liquid and granular formulations.  In addition, Bill noted that many users across the country, and internationally, are benefiting from drone technology, specifically for mosquito control. Because the Federal Aviation Administration (FAA) requires a specific process for the safe integration of drones into the National Airspace (NAS), Bill detailed how a public agency can attain a Certificate of Authorization (COA). There was a high level of interest and numerous questions by the commissioners on operating drones for mosquito surveillance and aerial applications of materials to control mosquito populations. Leading Edge’s booth in the vendor hall offered a great opportunity for all attendees of the Florida Mosquito Control Association, including the commissioners, to see many of these unmanned aerial systems up close and in person.


Unmanned Aircraft Systems will change the mosquito control profession, making it much more safe and productive. This technology has the capacity to enhance many industries and mosquito control is no exception.


For more information, please contact Bill Reynolds 407-468-0008 or Shanon Kern at 916-718-3005.

Leading Edge Upcoming Conferences

2017 Northwest Mosquito and Vector Control Association Annual Fall Conference
October 4-6, 2017
Gross Mountain Lodge
2 Fairway Drive, Whitefish, MT 59937

February 13-17th, 2017
Town and Country Resort
San Diego, California

WCMVCA: 43rd Annual West Central Mosquito & Vector Control Association
February 22-23, 2017
Hilton Garden Inn Grand Avenue
Laramie, Wyoming

Mosquito & Vector Control of California Annual Meeting
March 26-29th, 2017
Hyatt Regency Mission Bay (San Diego)

DROPVISION® Used for Droplet Densities & Sizes

St. Tammany utilizes 14 ground ULV spray units and two airplanes in its mosquito control operations. Depending on the season, adulticiding can begin in March and continue through December. Since temperatures can vary, it is very important that the droplet size & density be monitored throughout the year. At best, this is an extremely time consuming, eye straining and brain exhausting process. In the 70’s, even the mathematical computations had to be done on a calculator. Needless to say, when DropVision® came along, we jumped at the opportunity to try it!

Our first tests were conducted on our 14 ULV spray units. These include 2 Lecos, 7 London Fogs, 2 Phoenix spray units & 4 homemade units, all of which are equipped with the Phoenix spray head. Teflon coated slides (1”x3”) were place on a pendulum swing arm located 4’ from the spray head. The unit was turned on and the slide was passed through the spray. The slide was taken to the lab, placed on the microscopes’ mechanical stage and DropVision® electronically captured images of the slide. In this process, each droplet is analyzed and all background objects, coalesced droplet and nonqualified droplets are eliminated.

DropVision® provides current label language requirement standards, incorporating DV.1, DV.5 and DV.9, droplet densities per millimeter squared and relative span.

We were able to test all 14 units in 1 ½ days. Normally, it would take us nearly a week to do the same tests. One of the first things we realized was that we could test 3 different spray pressures on each unit, read the droplets with DropVision® and choose the optimum pressure for each unit. Prior to DropVision®, we would test 1 pressure, read the droplets and determine the MMD. If the droplets weren’t within the proper range, we would go out, change the pressure and start all over again.

For our aerial operations, we have an Aztec PA 23-250 equipped with nineteen 80067 Tee jet nozzles, and a BN 2-T Islander equipped with eighteen 80067 nozzles. Both planes are equipped with ADAPCO’s Wingman GX Spray Management System which uses SkyTracker software. To calibrate the planes, 5 stakes are set out 50’ apart perpendicular to the spray path. Teflon coated slides (1”x3”) are placed on John Hock spinners at each of the stakes. The plane is flown 40-50  over the spinners, which are left on for 8 minutes after the flight.

Last year the MMD was manually determined to be 29.2 microns for the Aztec and 30.7 microns for the Islander. This year, using DropVision®, the MMD was 29.29 microns for the Aztec and 32.49 microns for the Islander. This year, with the help of DropVision®, we hope to ground truth and confirm the model utilized in the Wingman Management System and confirm the 1000’ swath width that we use in our aerial operations. We plan to conduct tests on both planes using Dibrom that we presently use as well as Duet. We also would like to try to determine how temperature inversions affect our spray operations at different times during the day.

Thus far, we have conducted three such tests. For these tests, a row of eleven slide impingers, spaced 200’ apart was set in the direction of the wind in an open area of the Slidell airport. Again, two 1”x3” Teflon coated slides were placed at each stake. The Aztec was flown perpendicular to the row of slides. The offset of the spray line was determined by the model based on real time weather at 200’. The temperature at ground level and 100’ was also determined. The spray was turned on 3000’ before and after the row of impingers. The impingers were activated for 30 minutes after the spray flight. A set of impingers was also placed in the field prior to the spray flight and served as a control. A total of 24 slides had to be read for each of these tests.

Prior to DropVision®, this was a daunting task, which took days. With DropVision®, it took only a couple of hours to read all the slides for each test. Unfortunately, thus far, rotating winds have made it difficult to come up with any definitive answers. However, with the use of DropVision®, we feel we can conduct many such tests and still maintain the sanity of the one in charge of droplet analysis!

Contributed and written by Viki Taylor, St. Tammany Parish Mosquito Abatement District, July 2010

On-Site and Time Sensitive Solutions with DROPVISION®AG


On May 12, 2010, Leading Edge Associates, LLC was contracted to provide Airborne Support, Inc. (ASI) of Houma, LA droplet analysis and swath characterization for two of their DC-3 (C-47) aircraft using DropVision®AG. These aircraft required detailed validation of the droplet spectrum before being utilized in connection with the Gulf of Mexico Oil Spill containment and cleanup efforts by Homeland Security.

ASI is currently providing aerial application support to British Petroleum (BP) and their subsidiary Seacor Environmental Services, Inc. (Seacor) by spraying the oil spills with Nalco’s Corexit, which when deployed acts as a dispersant. Nalco’s Corexit is a very effective and proven method of minimizing the impact of a spill on the environment. When Corexit dispersants are applied, the oil is broken up into tiny biodegradable droplets that immediately sink below the surface where they continue to disperse and biodegrade. This quickly removes the spilled oil from surface drift…reducing direct exposure to birds, fish and sea life in the affected environment.

Homeland Security requested aerial applicators and associated contractors to provide data on their aircraft spray systems, aircraft and droplet spectrum as part of their qualification requirements. Leading Edge Associates, LLC conducted a droplet analysis and swath width characterization using their proprietary software known as DropVision® AG, which provides efficient, accurate and immediate data analysis of the droplet spectrum using water or oil sensitive dye cards.

DropVision® AG provided ASI critical results for the Dv0.1, Dv0.5 and Dv0.9 to comply with the governing agencies requirements. Additionally DropVision® AG provided data results for the Relative Span, droplet densities per cm2, total number of drops analyzed, percent of coverage across the swath, total volume applied, volume application rate per acre across the swath, and coefficient of variation across the entire swath.

These services were performed for two aircraft, with three replications each. From the DropVision® AG analysis, it was determined that ASI’s aircraft are producing compliant droplet spectrums and effective swaths and thus received approval from Homeland Security to begin flight operations in the Gulf on May 14, 2010.









We would like to thank Harold and Brad Barker for their support and hospitality during our visit to Houma, LA. If you are interested in learning more about the services and products provided by Leading Edge Associates, please visit our website at www.leateam.com or contact us directly at 828.926.6525.

DROPVISION®AG in CA Enables More Effective Swath Deposition

In a collaborative effort, Marin Sonoma Mosquito & Vector Control District, Alpine Helicopters Service, Inc. of Lodi, Ca. and Leading Edge Associates, LLC. of Waynesville, NC performed aircraft characterizations for two helicopters from the Alpine Helicopter fleet.

Leading Edge Associates employed the use of AGDISP, spray fate modeling software, resulting in relocating 6 of the 36 CP-03 nozzles. Alpine Helicopters physically repositioned the nozzles in preparation for the recharacterization flights. On July 7, 2010, DropVision®AG was used to re-characterize and validate the modifications, with the objective of normalizing the deposition rate per acre across the swath. The modifications to the spray boom configuration reduced the peak deposition values across the entire swath while maintaining an average application rate of 5.4-gallons per acre. The graph to the right charts the new deposition values, successfully eliminating very large volume depositions.

Leading Edge would like to thank Marin Sonoma Mosquito & Vector Control District, Alpine Helicopters and Stacy Bearden of Lucky 7 Research Services for their participation, trust, patience, confidence and integration of DropVision®AG into their program.

AGDISP is a product of the United States Forest Service & Continuum Dynamics, Inc. CP-03 nozzles are a product of CP Products Company, Inc. DropVision®AG is a registered trademark of Leading Edge Associates, LLC.

Which DropVision system is right for me?

DropVision System provides efficient and immediate data analysis of a droplet spectrum to ensure compliance with product labels.

The benefits of the system will provide considerable cost savings and the opportunity to more efficiently utilize resources. Users have the ability to analyze handheld sprayers or truck-mounted sprayers – but the system goes beyond anything offered by any other provider. DropVision is able to analyze slides from aircraft characterization and slide positioned at far field drift distances downwind of the release point of a spray cloud.

Generally speaking, the DropVision systems are designed to measure a range of droplets from 4 microns, commonly found in mosquito adulticides, to the largest droplet sizes associated with agricultural applications, 52-1000+ microns. The chart below provides an association of droplet size spectrums and the appropriate DropVision product.

Droplet CharacterDroplet Sizes* (Microns)DropVision Solutions

Extremely Fine & Very Fine 0 – 50
Fine 50 – 300
Medium 100 – 400
Course 150 – 600
Very Course 175 – 750
Extremely Course 200 – 850
Ultra Course 300 – 1150

Source: ANSI/ASAE S572.1 Mar2009 Spray Nozzle Classification by Droplet Size

DropVision AG

This system is designed to and is capable of reading droplets from 52 microns and up to the largest of those that can be collected in the 1000+ micron size. Typical applications are agriculture, mosquito larviciding, and forestry, where droplet deposition is the objective.

Click here to learn more about DropVision® AG

DropVision Basic & DropVision FL

Designed for extremely fine droplets, DropVision Basic& DropVision FL read droplets in the 4 200 micron size.

DropVision Basic provides immediate data analysis of a droplet spectrum to ensure compliance with insecticide labels. The benefits of the system will provide considerable cost savings and the opportunity to more efficiently utilize resources. Learn more here.

DropVision FL (Fluorescence) is designed for the user who samples airborne droplets with Impingers in geographic regions that have background particles that can be mistaken for insecticide sampled droplets. DropVision FL incorporates proprietary software that eliminates all background particles, only recognizing those droplets that contain a unique fluorescence tracer. Learn more here.