Week 38 – Sept 16-22

2012 MOSQUITO REPORT: WEEK 38

Report based on data collected from traps deployed the week of September 16-22, 2012. Report prepared by Chan Suom, M.S., Dave Lawson, and Nate Boonisar.

1. CURRENT MOSQUITO ACTIVITY/TREND

CDC Light Traps:
For the most part, host-seeking light traps have collected average numbers of mosquitoes for this time of the season. Only Avon, Canton, Holbrook, and Medway reported lower than average collections.

Gravid Traps:
Gravid trap collections have dropped off dramatically from last week and the historical average. Only Franklin collected higher than average numbers of ovipositing mosquitoes.

 2. CURRENT PREDOMINANT SPECIES

CDC Light Traps:
The most common CDC-trapped mosquitoes in Norfolk County this week were Aedes vexans though their numbers were very low.

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 this week is average for this time of the season. A combination of cooler weather and lack of significant, widespread rainfall are the main factors for our current condition. Franklin was the only town with higher than average mosquito activity, though this was only apparent in the gravid trap.

4. WEATHER SUMMARY

Temperatures this week were near normal overall. A strong cold front brought a band of heavy rain to the area early Wednesday morning with amounts ranging from 0.75” to 1.50” across the district. Rainfall this month has generally been below normal so far this month.

Looking back at the summer (past 90 days), rainfall was generally below normal across the district with two small pockets of above normal rain in the central and southeast part of the district. The least amount of rain fell in the southwest section.

Total weekly rainfall: 1.18 inches (+0.37 in.)
Total Monthly rainfall: 2.39 inches (-0.14 in.)
Total Yearly rainfall: 24.04 inches (-6.19 in.)

5. NUMBER OF REQUESTS FOR SERVICE

NCMCD has received 8,990 calls year to date for services as of 9/22/12.

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