Skip Navigation
Return to Layout View | Home | A-Z Directory | MaineStreet | Campus Map | Calendar
Follow UMaine on Twitter | Join UMaine on Facebook | Watch UMaine on YouTube | Admissions | Parents & Family | Apply to UMaine | Give Now | Emergency

Cooperative Extension: Maine Wild Blueberries


Site Navigation:


Spotted Wing Drosophila (SWD) August 26, 2013

SWD trap captures continue to build throughout the state.  At the University of Maine Blueberry Hill Farm, we are now catching 10-30 flies/trap.  Traps in other areas downeast are now capturing 30+ flies/trap.  These SWD continue to be mostly females; however, males appear to be making up a larger percentage than in previous weeks.  The increasing trap captures is evidence of fly reproduction and subsequent fruit attack. The proportion of fruit that have SWD larvae still appears to be very low; we have not yet detected any in fruit samples.  

Please continue to monitor and protect your fruit if necessary from this pest. Also, it looks as if the early harvesting that has been taking place all over the state will certainly pay dividends this year if we can get much of the crop in before significant damage starts to be detected.   Just remember that based upon last year’s monitoring, this pest can explode in numbers very quickly from just a few flies to hundreds / trap…so do not relax too much!   This is especially true as we get close to September. Last year SWD trap captures by September were averaging 40-50 flies/trap! 

NOTE:  Please refer any questions, comments or concerns to Frank Drummond, 1-800-897-0757 (Maine only) or 581-2989, frank.drummond@umit.maine.edu or to Dave Yarborough, 1-800-897-0757 or 581-2923, davidy@maine.edu.

SWD updates will only be sent out and posted on our blog when we have trap captures.

Yarborough, Drummond, McCarty Quoted in Press Herald Blog about Blueberry Harvest

The latest post on the Portland Press Herald blog “The Root: Dispatches from Maine’s food sources” included quotes from three University of Maine Cooperative Extension educators about the state’s blueberry harvest. David Yarborough, a wild blueberry specialist, spoke about the efficiency of the Bragg Blueberry Harvester; Frank Drummond, an entomologist, spoke about the spotted wing drosophila and its negative effects on the crop; and Kate McCarty, food preservation community education assistant, shared a recipe for Honeyed Blueberry Vanilla Jam.

Spotted Wing Drosophila (SWD) August 20, 2013

This summer appears to be a bit different than last year, the first year that we experienced SWD. It does appear that SWD is starting to build, evidence being multiple captures of 2-7 flies/trap with a few males being captured. However, the buildup appears to be slow and there are still several fields that have NOT captured any SWD yet. As far as blueberry growing regions go, SWD captures have occurred everywhere at this point with the highest numbers in the southern coastal area. Because of the evidence of reproduction in the field, resulting in fruit infestation, I suggest monitoring and if you have caught a single male SWD or multiple females then you should harvest that field immediately or protect it with an insecticide. I still believe we are safe from fields having significant damage as we have not been finding SWD larvae in fruit samples as of yet.

As I stated last week, please continue to monitor and protect your fruit if necessary from this pest. Also, it looks as if the early harvesting that has been taking place all over the state will certainly pay dividends this year if we can get much of the crop in before significant damage starts to be detected. Just remember that based upon last year’s monitoring, this pest can explode in numbers very quickly from just a few flies to hundreds/trap…so do not relax too much! 

NOTE:  Please refer any questions, comments or concerns to Frank Drummond, 1-800-897-0757 (Maine only) or 581-2989, frank.drummond@umit.maine.edu or to Dave Yarborough, 1-800-897-0757 or 581-2923, davidy@maine.edu.

SWD updates will only be sent out and posted on our blog when we have trap captures.

Drummond Quoted in TakePart Article on Climate Change Threatening Foods

Frank Drummond, entomologist at the University of Maine, was quoted in a TakePart article titled “Is climate change threatening Maine’s staple foods?” Drummond spoke about the spotted wing drosophila, a new fruit fly that is targeting the state’s blueberries. Drummond said the pests need to be monitored and managed, but harvesting berries earlier and using an experimental mesh trap could help keep the flies off the berries.

Spotted Wing Drosophila (SWD) August 13, 2013

Trap captures of spotted wing drosophila continue to occur throughout the state, BUT appear to have jumped up a bit. There are still some fields that have not had trap captures and many have had just the 1 or 2 SWD. However, late last week  in southern Maine, trap captures jumped quickly with one small fruit field in Bowdoinham having over 200 SWD in a trap! Yesterday in Jonesboro we were finding 2-15 flies/trap in fields that a week ago just had either no captures or 1 SWD in a trap. Therefore, this is evidence that SWD are beginning to multiply in blueberries. The infestation must be still very low. We took fruit samples yesterday in the fields that had increasing SWD trap captures and we still did not detect larvae in the fruit and so the infestation is most likely spotty in the fields and at very low levels. However, from last year it became apparent that SWD can build up very rapidly.

Please continue to monitor and protect your fruit if necessary from this pest. Also, it looks as if the early harvesting that has been taking place all over the state will certainly pay dividends this year if we can get much of the crop in before significant damage starts to be detected.

NOTE: SWD updates will only be made when we have trap captures.  Please refer any questions, comments or concerns to Frank Drummond, 1-800-897-0757 (Maine only) or 581-2989, frank.drummond@umit.maine.edu or to Dave Yarborough, 1-800-897-0757 or 581-2923, davidy@maine.edu.

Yarborough Talks about Blueberry Harvest with WABI, Press Herald

David Yarborough, wild blueberry specialist with the University of Maine Cooperative Extension, spoke with WABI (Channel 5) and the Portland Press Herald about this year’s harvest. He said heavy rainfall left some areas of the state with a small crop, while other places — such as Down East — produced larger crops.

Yarborough Discusses Blueberry Harvest with WLBZ

David Yarborough, wild blueberry specialist with the University of Maine Cooperative Extension, spoke with WLBZ (Channel 2) about this year’s harvest. He said he thinks the state will see a better-than-average crop this year.

Drummond, Yarborough Talk to Media about Blueberry Growing, Harvest

Frank Drummond, entomologist at the University of Maine, and David Yarborough, wild blueberry specialist with the University of Maine Cooperative Extension, spoke with BangorMetro about growing blueberries in Maine. Drummond focused on increasing native pollinators and Yarborough spoke about the history of growing blueberries and Maine’s crop. Yarborough also spoke with the Bangor Daily News about this year’s crop for the article “Above-average blueberry harvest expected after heavy rains.” He talked about the large size of the blueberries, as well as growers’ concern of the spotted wing drosophila, a fruit fly that damages berries.

Yarborough Talks to AP about Harmful New Fruit Fly

David Yarborough, blueberry specialist for the University of Maine Cooperative Extension, spoke with the Associated Press about a new fruit fly posing a threat to the state’s blueberry crop. Yarborough said while growers are anxious about the flies, they’re doing what they can to monitor and control them. The Washington Post, Kennebec Journal and PhillyBurbs.com were among news organizations to carry the report.

Spotted Wing Drosophila (SWD) August 4, 2013

As of last week, trap captures of spotted wing drosophila continue to occur throughout the state. There have only been a few fields at this point where multiple flies are being caught. Most fields either have had NO trap captures yet OR just one or two SWD. We have identified SWD larvae in fresh fruit from Coastal Maine, but fruit still appear to be free of larvae in the Downeast region. I suspect that SWD larvae might be appearing in more fields over the next few weeks. At this date many larvae have been observed in fruit, but they have almost all been larvae of the blueberry fly (BMF).  The abundance of this pest is extremely high this year and can be very damaging. Please continue to monitor and protect your fruit if necessary from this pest.

Both larvae of SWD and BMF are a translucent white color. The BMF larvae are pointed in the front and very thick and blunt at the rear and so they resemble more of a cigarette that has one end twisted to a point. The SWD larvae are pointed at BOTH the front and the rear.

I will let everyone know when I start finding or hear about others finding SWD larvae Downeast.

NOTE:  SWD updates will only be made when we have trap captures. Please refer any questions, comments or concerns to Frank Drummond, 1-800-897-0757 or 581-2989, frank.drummond@umit.maine.edu or to Dave Yarborough, 1-800-897-0757 or 581-2923, davidy@maine.edu.


Sidebar

YouTube logo
Wild Blueberry Videos

University of Maine Cooperative Extension


Contact Information

Cooperative Extension: Maine Wild Blueberries
5741 Libby Hall
Orono, Maine 04469-5741
Phone: 207.581.3188, 800.287.0274 (in Maine) or 800.287.8957 (TDD)E-mail: extension@maine.edu
The University of Maine
Orono, Maine 04469
207.581.1110
A Member of the University of Maine System