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June 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 June compared to the five-year average for the six most common mosquito species in San Mateo County. Culex erythrothorax was the most frequently collected mosquito in June, but numbers were only slightly above average. These mosquitoes are collected in tule marshes, which will be treated by helicopter. Culex pipiens, typically the most common mosquito in June, is well below average this year. Adult mosquito abundance over the rest of the summer will be dependent on weather, including daily temperature and rainfall, and the effectiveness of control measures.

 

Species

June 2020

5-year June average

Culex erythrothorax

6.92

4.59

Culex pipiens

6.73

14.68

Culiseta incidens

1.72

1.81

Aedes sierrensis

0.69

0.52

Culex tarsalis

0.32

1.02

Aedes washinoi

0.09

1.35

Commands