Week 36 – Sep 1-7

2013 MOSQUITO REPORT: WEEK 36

Report based on data collected from traps deployed the week of September 1-7, 2013. Report prepared by Chan Suom, M.S., Dave Lawson, and Nate Boonisar.

1. CURRENT MOSQUITO ACTIVITY/TREND

CDC Light Traps:
Collections from host-seeking mosquito CDC light traps in Norfolk County are mixed this week. Avon, Milton, Stoughton, and Weymouth reported lower than average numbers of mosquitoes, whereas Dedham, Dpover, Foxborough, Franklin, Medway, Quincy, Randolph, Sharon, and Wrentham experienced the opposite.

Gravid Traps:
Gravid traps continue to show an average number of mosquitoes throughout Norfolk County for the week, though Franklin, Medway, Needham, Quincy, and Randolph collected more than the historical average for this time of the season.

 2. CURRENT PREDOMINANT SPECIES

CDC Light Traps:
The most abundant mosquito species this week, in order of abundance, are Culex pipiens/restuans, Aedes vexans, Coquillettidia perturbans, Psorophora ferox, and Culiseta melanura. Overall there is a spike in the abundance of Culex pipiens/restuans.  There are also plenty of Anopholes punctipennis and Uranotaenia sapphirina making a showing in some towns.

Gravid Traps:
Culex pipiens/restuans are predominant 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 mixed. Gravid collections are average to above average. In terms of abundance, we are seeing mostly Culex pipiens/restuans, Aedes vexans, Coquillettidia perturbans, Psorophora ferox, Culiseta melanura, Anopheles punctipennis, and Uranotaenia sapphirina. With the scattered rain events in Norfolk County this past Monday, we are expecting to see a higher number of flood species the following week though their development may be delayed as the weather becomes cooler.

4. WEATHER SUMMARY

Temperatures this week overall averaged near normal, with one chilly day on Friday. Significant rainfall occurred early in the period over the Labor Day weekend when slow moving thunderstorms moved across the district. The heaviest rains of 2-3 inches fell from Dover/Medfield eastward to Canton with some local amounts up to near 4 inches in Dover. This rain fell within a couple hours causing flash flooding. Otherwise a large swath in the center of the district received over an inch of rain, while the extreme east and west received under an inch.

Total weekly rainfall: 1.58 inches (+0.78 in.)
Total Monthly rainfall: 1.58 inches (+0.78 in.)
Total Yearly rainfall: 31.35 inches (+2.85 in.)

5. NUMBER OF REQUESTS FOR SERVICE

We received 380 service requests this week, with a total of 11,279 service requests for the year.

6. MCP/COMMISSION RESPONSE

As mentioned in the previous report, catch basin treatments have ended. We are focusing on surveillance and ULV applications. We are conducting some barrier applications on municipal property where appropriate. We are on alert for possible localized flood species outbreaks due to the severe rain storm this past Monday. In the event of such outbreaks, we will likely focus additional ULV efforts where appropriate.

Contact

144 Production Rd, Suite C

Walpole, MA 02081

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