Week 37 – Sep 8-14

2013 MOSQUITO REPORT: WEEK 37

Report based on data collected from traps deployed the week of September 8-14, 2013. Report prepared by Chan Suom, M.S., Dave Lawson, and Nate Boonisar.

1. CURRENT MOSQUITO ACTIVITY/TREND

CDC Light Traps:
The majority of CDC light traps are collecting average numbers of mosquitoes throughout the county. Holbrook, Millis, and Needham reported lower than average activity, whereas Randolph, Walpole, and Westwood indicated the contrary.

Gravid Traps:
Gravid traps are collecting Culex pipiens/restuans species in abundance as the weather cools toward the end of the season. Most trap collections range from average to higher than average for the week.

 2. CURRENT PREDOMINANT SPECIES

CDC Light Traps:
The most abundant mosquito species this week, in order of abundance, are Coquillettidia perturbans, Aedes vexans, Culex pipiens/restuans, Culiseta melanura, and Psorophora ferox. There continue to be plenty of Anopholes punctipennisand Uranotaenia sapphirina in most towns.

Gravid Traps:
Culex pipiens/restuans are predominant in these traps and their overall population is average to above 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 average. Gravid collections are average to above average. In terms of abundance, we are seeing mostly Coquillettidia perturbans, Aedes vexans, Culex pipiens/restuans, Culiseta melanura, and Psorophora ferox, Anopheles punctipennis, and Uranotaenia sapphirina. We did not see a spike in the number of flood-dependent species as we had expected from the torrential rain event on Monday, September 2nd, which indicate that cooler weather and shorter days are working in our favor.

4. WEATHER SUMMARY

Temperatures this week averaged above normal with hot weather in the middle of the week. A cold front brought thunderstorms followed by a steady rainfall Thursday night with additional light showers on Friday. Total rainfall amounts were generally either side of a half inch district wide. So far this month, rain has been below normal in the southwest and eastern parts of the district, and above normal in the central part.

Total weekly rainfall: 0.63 inches (-0.17 in.)
Total Monthly rainfall: 2.21 inches (+0.61 in.)
Total Yearly rainfall: 31.98 inches (+2.67 in.)

5. NUMBER OF REQUESTS FOR SERVICE

We received 241 requests for service this week, with a total of 11, 520 service requests for the year.

6. MCP/COMMISSION RESPONSE

Thursday, September 12th was the last evening of regularly scheduled ULV applications. The field crew are returning to a day shift starting September 16th, but we will consider ULV applications in response to EEE virus isolations if weather conditions permit on any given evening. The field crew will now focus on water management work for the remainder of the season.

Contact

144 Production Rd, Suite C

Walpole, MA 02081

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