Week 26 – June 22-28

2014 MOSQUITO REPORT: WEEK 26

Report based on data collected from traps deployed the week of June 22-28, 2014. Report prepared by Chan Suom, Dave Lawson, and Nate Boonisar.

1. CURRENT MOSQUITO ACTIVITY/TREND

CDC Light Traps:
CDC light trap collections continue to indicate lower than average mosquito activity for most of the county. Holbrook and Stoughton are experiencing average mosquito activity whereas Bellingham, Dover, Medfield, Millis, Needham, Randolph, and Weymouth report higher than average host-seeking mosquito activity.

Gravid Traps:
Gravid trap activity is split between average and lower than average for the week in comparison with historical data. Braintree continues to collect higher than average numbers of ovipositing mosquitoes. Needham also reports higher than average levels of ovipositing mosquito activity.

 2. CURRENT PREDOMINANT SPECIES

CDC Light Traps:
The most abundant mosquito species this week are Coquillettidia perturbans followed byAedes vexans and Ochlerotatus canadensis.

Gravid Traps:
Culex pipiens/restuans are the main species in these traps and their overall population is average for this time of the season.

3. COMPARISON TO PREVIOUS SEASON

The overall mosquito population for host-seeking mosquitoes in CDC light traps is lower than the historical average whereas gravid trap activity is mostly average. Ochlertotatus canadensis populations are still large but it appears that their numbers are declining compared to the previous weeks’ data. Coquillettidia perturbans has been emerging in recent weeks and should reach their population peak within the next few weeks as indicated by historical data. Aedes vexans abundance is high and appears to be localized to Medfield. Psorophora ferox has made its presence known with a minor emergence in parts of Bellingham and Weymouth.

Please refer to our surveillance charts for detailed trap collection data.

4. WEATHER SUMMARY

Not available this week.

5. NUMBER OF REQUESTS FOR SERVICE

We had 547 calls for service this week and a total of 3,843 service requests for the year so far.

6. MCP/COMMISSION RESPONSE

The District is currently responding to requests for ULV applications with our evening ULV application program. Catch basins are being treated in the District’s towns. Requests from residents for ground larvicide applications are continuing, but the majority of these requests are now revealing sites that are drying up, or are devoid of mosquito larvae.

Contact

144 Production Rd, Suite C

Walpole, MA 02081

Office: (781) 762-3681
Fax: (781) 769-6436