Solutions for Floodwater Mosquito Control
Western US Floodwater Summit

Virtual Summit
January 19, 2021

Session Presentations:

“Common floodwater mosquitoes in California: the overlooked vectors?”

Presented by: Mark Novak, Supervising Public Health Biologist; California Department of Public Health, Vector-Borne Disease Section

This presentation will cover the biology and distribution of mosquito species commonly found in various floodwater ecotypes in California, with a major focus on freshwater Aedes species. Although most of these species have limited involvement with the transmission of human disease pathogens, adults may occur locally in large numbers and their biting can create a significant public nuisance.

“Biorational Larvicides and Larviciding for mosquito control with notes on resistance management”

Presented by: Steven Su, Scientific Director; West Valley Mosquito & Vector Control District, CA

The presentation will cover larvicide resistance and an overview of active ingredients available for floodwater mosquitos.

“Pyrethroid resistance in Culex tarsalis in regions of Northern California”

Presented by: Tara Thiemann, Associate Professor of Biological Sciences; University of the Pacific

This study looks at pyrethroid resistance in 17 Culex tarsalis populations across 5 counties. We assessed the prevalence of permethrin resistance using bottle bioassays, and we 2 explored mechanisms of resistance by testing the levels of detoxifying enzymes and by looking for the presence of the knockdown resistance (kdr) genetic mutation.

“Floodwater mosquito management in the western USA”

Presented by: Peter DeChant, Chief Executive Officer; DeChant Vector Solutions LLC (DVS)

Larval control solutions in flood plains/irrigation habitats.

“Managed Wetland Mosquito Control Strategies”

Presented by: Marty Scholl, Ecological Management Supervisor; Sacramento-Yolo Mosquito & Vector Control District, CA

Managed wetlands are typically flooded, drained, and maintained seasonally for waterfowl habitat. This presentation will briefly describe the protocols the Sacramento-Yolo Mosquito and Vector Control District has established for sound IPM including the implementation of wetland BMPs, timing of flooding, larvicide rotation and use of UAS technologies.

“Challenges of mosquito control in flood irrigated habitat”

Presented by: Matt Hutchinson, District Manager; Baker Valley Vector Control District, OR

This presentation will cover the methods Baker Valley Vector Control District uses to control mosquitoes in flood irrigated pastures & hay fields. It will discuss the ways the district applies products to control mosquitoes, working with landowners to control mosquitoes more effectively, operational challenges the district faces, and future plans to improve control efforts.

“Surveillance and Control Strategies for Aedes squamiger in the Coastal Region of Northern CA”

Presented by: Erik Engh, Environmental Biologist; Marin/Sonoma Mosquito and Vector Control District, CA

We will report on the Marin/Sonoma Mosquito and Vector Control District’s strategy for controlling this problematic species, including surveillance, timing of applications, materials/equipment used, source reduction work and use of GIS technology.

“Enough of these Anopheles!”

Presented by: Stephen Ingalls, Field Supervisor; Benton County Mosquito Control, WA

The unique phenomenon of water stargrass in the Yakima River. Water stargrass creating habitat for Anopheles freeborni. Significant increase in Anopheles mosquitoes in CO2 traps. Solutions attempted: VectoBac GS applied by air (limited basis in test area), VectoBac 12 AS applied by hand sprayer from a kayak (limited basis in test area), and changes in river level. Coordination with other governmental agencies to secure funding for a harvester to remove the stargrass from the river in selected areas.

“Placer Mosquito & Vector Control District’s UAS program”

Presented by: Jacob Hartle and Scott Schon, Placer Mosquito Abatement District, CA

An overview Unmanned Aircraft Systems (UAS) Operators for Placer Mosquito and Vector Control District in California.

“Technical Challenges and Solutions for Low Rate Applications”

Presented by: Banugopan Kesavaraju, PhD., Global Technical Manager; Valent BioSciences, LLC

Technical challenges of delivering low rate applications with consistency and the solutions to those equipment challenges.

“From Skeptic to True Believer”

Presented by: Andrew Sage, Senior Wetlands Manager – Aerial Operations Unit, Franklin County Mosquito Control, WA

Drone applications of MetaLarv SP-T for larval control in wetlands.

“Panel Discussion”

Full Presentation

The complete recording from the Western US Floodwater Summit on Tuesday, January 19, 2021.

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