Adult mosquito Surveillance

Adult Mosquito Surveillance, also referred to as Surveillance, or "Trapping," indicates adult mosquito populations in given areas. Information collected is used to determine populations of specific mosquito species, presence of disease in mosquito samples, future population spikes, effectiveness of larvaciding efforts, and other various uses.

Trapping is the data center of a true Integrated Mosquito Management program. While trapping is most the most reliable adult surveillance method, additional proven field techniques are used by field staff every day.

Harborage Assessments - Adult mosquitoes prefer to roost in shaded areas absent of wind movement through the day (ie. Culverts, drain pipes, under bridges, etc.). Our entomologists routinely inspect these areas to obtain landing rate counts, procure rough species numbers, and count the number of adults on walls and cool concrete surfaces.

Landing Rate Counts –To test Landing Rate Counts, members of our staff stand still with arms outspread at shoulder height, looking down at their torso, arms and legs for a preset period of time, and counts the number of mosquitoes landing on their body. This is an indicator of the adult female population in a small area. These numbers are recorded and factored into action decisions along with trap counts, disease test results, larval numbers and developmental stage, and some environmental factors.

CDC Light Trapping - This trap utilizes CO2 and a light source to trap mosquitoes in a given area. Light traps are great indicators of population makeup and potential. This information is useful in assessing both Larvaciding and Adulticiding efficacy. Both male and female mosquitoes of many different species are attracted to these traps and they are not regularly used for disease surveillance.

CDC Gravid Trapping – This trap is mainly used for disease surveillance since it is very specific for blood- fed females ready to lay eggs. Since blood fed female mosquitoes are carriers of virus and Culex quinquefasciatus females prefer high organic content water in which to lay eggs, the CDC Gravid Trap selects for these. The trap is a fan tube placed over a container holding a suitable water source for egg laying. The water placed into the container (“stink water”) is specially infused to simulate water found in roadside ditches, culverts, creek washes, old tires, and in nearly every urban backyard. The female mosquito is drawn to this water and the fan tube places her into a collection bag which is then collected, counted, and tested for the presence of disease. Groups of tested female mosquitoes are referred to as a “pool” of tested mosquitoes.

Rid All offers both types of trapping on set schedules and at numerous selected sites throughout the city. We also offer real time PCR testing of our mosquito pools with same day, 24 hour, and 48 hour results. Surveillance information is crucial to building an effective mosquito control program since the data collected drives Larvaciding efforts and triggers Adult Mosquito Control decisions.