Mosquito Larval Collections from December 2018

Surveillance of water for mosquito larvae increases after autumn rainfall, when marshes, impounds and natural ponds fill with water. A technician uses a dipper to take a sample of the water and visually inspects it for mosquito larvae. If larvae are present, the technician transports the sample to the laboratory for counts and identification. This December, 41 larval samples were submitted to the laboratory. The most frequently occurring species in larval samples was Cs. incidens, from 21 out of 41 samples. This mosquito is found year round in a variety of sources, especially back yard fountains and fish ponds. Aedes squamiger, the salt marsh mosquito and Culex pipiens, the northern house mosquito were also collected frequently this past month. Aedes squamiger typically begins larval development in December.  Larvae of Culex pipiens will develop year round, often in sheltered, man-made sources.