Post

November 2019 CO2 Trap Results

The following table and graph show the average number of mosquitoes collected per CO2 trap per night during the month of November compared to the five-year average for the six most common mosquito species in San Mateo County. Counts for all species continue to decline as we progress into the cooler season. Culex pipiens, the northern house mosquito, was the most abundant mosquito collected this month and was collected in above average numbers. This species breeds in catch basins, water under buildings, and residential containers in yards.

 

Species

November 2019

5-year November average

Cx. pipiens

11.08

4.49

Cx. erythrothorax

0

0.35

Cx. tarsalis

0

0.08

Cs. incidens

0.05

0.30

Ae. sierrensis

0

<0.01

Ae. washinoi

0.10

<0.01

     

Commands