Week 25 – June 15-21

2014 MOSQUITO REPORT: WEEK 25

Report based on data collected from traps deployed the week of June 15-21, 2014. Report prepared by Chan Suom, Dave Lawson, and Nate Boonisar.

1. CURRENT MOSQUITO ACTIVITY/TREND

CDC Light Traps:
This week’s CDC light trap data continues the trend with most towns reporting a lower than average collection of host-seeking mosquitoes. Milton, Norwood, Plainville, Stoughton, Westwood had average levels of activity whereas Dedham, Dover, Medfield, Needham, Randolph, and Weymouth reported higher than average levels of mosquito activity.

Gravid Traps:
Gravid trap activity is split between average and lower than average for the week in comparison with historical data. Only Bellingham and Braintree collected a higher than average number of ovipositing mosquitoes.

 2. CURRENT PREDOMINANT SPECIES

CDC Light Traps:
The most abundant mosquito species this week are Coquillettidia perturbans followed byOchlerotatus canadensis, Aedes vexans, and Culiseta melanura..

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.

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

4. WEATHER SUMMARY

Temperatures this week were above normal to start the week, then cooled to near normal high temperatures for the remainder of the week, but somewhat below normal at night due to very dry air/low humidity.  Some heavy showers moved across eastern portions of the district Tuesday morning, providing ¼ to ½ inch of rain in a narrow band from Needham to Weymouth.  The remainder of the district had no rainfall this week.

Total weekly rainfall: 0.00 inches (-0.76 in.)
Total Monthly rainfall: 1.46 inches (-0.81 in.)
Total Yearly rainfall: 19.41 inches (-0.92 in.)

5. NUMBER OF REQUESTS FOR SERVICE

We had 754 calls for service for this week and a total of 3,442 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. Salt marshes were treated with larvicide during the week of June 16 in response to a spring high tide on June 15th.

Contact

144 Production Rd, Suite C

Walpole, MA 02081

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