Adult Mosquito Control to Take Place in Martinez and Discovery Bay

Press Release

by CC News September 1, 2023

written by CC News September 1, 2023

CONCORD, CA – The Contra Costa Mosquito and Vector Control District (District) reports 11 more dead birds and three more groups of trapped mosquitoes have tested positive for West Nile virus (WNV) in Contra Costa County.

The dead birds were collected from Concord (5), Walnut Creek (2), Martinez, Pleasant Hill, El Cerrito, and Alamo; while the mosquitoes were trapped in Discovery Bay, Martinez, and Holland Tract near Knightsen. So far this year, there have been 22 dead birds, 11 groups of trapped mosquitoes, and three sentinel chickens that have tested positive for WNV in 2023.

Due to increasing West Nile virus activity in the area, the Contra Costa Mosquito and Vector Control District will be using truck-mounted, ultra-low volume sprayers to control adult mosquitoes in two locations:

DATE: Saturday, September 2, 2023

TIME: Between dawn (approximately 4:00 a.m.) and 8:00 a.m., weather permitting.

LOCATION One: Martinez (Waterfront Area)

The area to be treated is bordered on the north by the Carquinez Strait; on the south by Rail Road Tracks/Waterfront Road; on the east by Pacheco Slough, and on the west by Rail Road Tracks/Embarcadero Street.

LOCATION Two: Discovery Bay

The area to be treated is bordered on the north by Willow Lake Road and Marina Road; on the south by Highway 4; on the east by Cherry Hills Drive; and on the west by Discovery Bay Boulevard.

MATERIALS USED: The insecticide to be used is Zenivex E4 RTU applied at a rate of 1.5 ounces per acre by truck-mounted ultra-low volume sprayers.

MAP: (For a larger, interactive map, please click here – available shortly after this notification is published.)

For more information, visit our website.

The Contra Costa Mosquito & Vector Control District utilizes an integrated vector management program which means we use a variety of protocols for controlling mosquitoes. These protocols include public education, physical control such as managing vector habitat, biological control such as mosquitofish, and chemical control such as pesticides.

The majority of the District’s mosquito control is completed when mosquitoes are still in their aquatic form, in their water source. Once mosquitoes emerge from the water as adults, the only effective method to control them is by adult mosquito control. We use only those products registered with the Environmental Protection Agency (EPA) for the use of mosquito control and protecting public health. They are applied by our trained and certified technicians.