Week 34 – Aug 19-25

2012 MOSQUITO REPORT: WEEK 34

Report based on data collected from traps deployed the week of August 19-25, 2012. Report prepared by Chan Suom, M.S., Dave Lawson, and Nate Boonisar.

1. CURRENT MOSQUITO ACTIVITY/TREND

CDC Light Traps:
Host-seeking traps are returning average numbers of mosquitoes from most of Norfolk County.  Only Quincy and Weymouth experienced above average mosquito activity whereas Avon, Canton, Franklin, Holbrook, Medway, Millis, and Milton encountered the opposite.

Gravid Traps:
Gravid traps continue to indicate lower than average numbers of ovipositing mosquitoes though some towns such as Bellingham, Foxborough, Franklin, and Medway, are collecting higher than average numbers in their respective traps.

 2. CURRENT PREDOMINANT SPECIES

CDC Light Traps:
The most predominant CDC trapped mosquitoes in Norfolk County this week were Aedes vexans, with populations higher than average in Quincy and Weymouth.  There are some noticeable populations of Psorophora ferox where there are Ae. vexansemergences.  Ae. taeniorhynchus and Ae. sollicitans are highly abundant in Quincy at the moment.

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

Although Aedes vexans populations are higher in Quincy and Weymouth, the overall mosquito population is average throughout Norfolk County.  The northeastern part of our county received more precipiation in the last rain event that faciliated the development of these flood and salt marsh species that we are now experiencing in Quincy and Weymouth: Ae. vexans, Ae. taeniorhynchus, Ae. sollicitans, and Ps. ferox.

4. WEATHER SUMMARY

Temperatures were slightly above normal overall with low to moderate humidity.  There was no measurable precipitation district-wide this week.

Total weekly rainfall:  0.00 inches (-0.78 in.)
Total Monthly rainfall: 2.52 inches (-0.17 in.)
Total Yearly rainfall: 20.31 inches (-6.72 in.)

5. NUMBER OF REQUESTS FOR SERVICE

NCMCD has received 8,006 calls year to date for services as of 8/24/12. The NCMCD received 686 calls for service this week.

6. MCP/COMMISSION RESPONSE

The NCMCD continues to respond to ULV requests by residents. With the recent finding of multiple EEE positive pools of Cq. perturbans in Canton, the District has stepped up additional ULV applications in Canton and Randolph. Basin treatments have been completed in most communities in our district and we are scaling down this operation as the season draws closer to autumn.  Very few larvicide requests are being initiated at this time.

Contact

144 Production Rd, Suite C

Walpole, MA 02081

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