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May 2020 CO2 Trap Collections

The following table and graph show the average number of mosquitoes collected per CO2 trap per night during the month of May compared to the five-year average for the six most common mosquito species in San Mateo County. Counts for all species are averaging below five per trap night, which is below average for Culex pipiens at this time of year, but consistent with the five-year average for other species. Adult mosquito abundance will likely continue to rise as the daily temperatures increase in the summer months.

Species

May 2020

5-year May average

Culex pipiens

3.61

8.37

Culex erythrothorax

2.52

2.07

Aedes sierrensis

1.21

1.19

Culiseta incidens

1.20

1.52

Aedes washinoi

0.21

0.76

Culex tarsalis

0.13

0.73

 

Commands