Week 37 – Sept 9-15

2012 MOSQUITO REPORT: WEEK 37

Report based on data collected from traps deployed the week of September 9-15, 2012. Report prepared by Chan Suom, M.S., Dave Lawson, and Nate Boonisar.

1. CURRENT MOSQUITO ACTIVITY/TREND

CDC Light Traps:
Similar to last week, host-seeking traps indicated mixed activity throughout the county, mainly average to lower than average collections.  Only Avon, Foxborough, Plainville, and Sharon collected higher than average numbers of mosquitoes.

Gravid Traps:
Gravid trap collections, for the most part, have returned to average levels for this time of the season.

 2. CURRENT PREDOMINANT SPECIES

CDC Light Traps:
The most predominant CDC trapped mosquitoes in Norfolk County this week were once again Culiseta melanura. There are also abundant populations of Aedes vexans in a couple of our towns.  There is no indication of further Coquillettidia perturbans activity in our county.

Gravid Traps:
Though their populations are low, Culex pipiens/restuans are the most predominant species in gravid traps throughout Norfolk County.

3. COMPARISON TO PREVIOUS SEASON

The overall mosquito population for the week is lower than average in comparison with the historical averages. A combination of cooler weather and lack of significant, widespread rainfall are the main factors for our current condition. Aedes vexans is abundant locally in Avon and Foxborough, whereas Plainville, Sharon, and Walpole indicate higher than average numbers of Culiseta melanura. Bellingham reported a higher than average collection of Ochlerotatus japonicus in its gravid trap, which is not unusual for this time of the season.

4. WEATHER SUMMARY

Temperatures this week were slightly above normal overall with low humidity levels. The only precipitation was on Saturday when a cold front moved across the region with a brief band of showers. Rain amounts were generally under a tenth of an inch.

Total weekly rainfall: 0.04 inches (-0.77 in.)
Total Monthly rainfall: 1.21 inches (-0.51 in.)
Total Yearly rainfall: 22.86 inches (-6.56 in.)

5. NUMBER OF REQUESTS FOR SERVICE

NCMCD has received 8,990 calls year to date for services as of 9/14/12. The NCMCD received 2 calls for service this week.

6. MCP/COMMISSION RESPONSE

The District has stopped taking resident requests for ULV applications and larviciding, and has suspended ULV applications. This week’s forecasted weather is not conducive for applications. Should an emergency situation arise, we are prepared to use overtime to conduct evening applications. We will conduct barrier applications on school properties when appropriate. The filed crew has now shifted to conducting water management work.

Contact

144 Production Rd, Suite C

Walpole, MA 02081

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