Posts Tagged ‘Spotted Wing Drosophila’

SWD Update from Frank Drummond – August 19,2014

Monday, August 25th, 2014

Last week (Aug 19th) SWD trap captures in both the Blue Hill and Jonesboro area remained stable with little change in adult captures compared to the previous week (Blue Hill = 10-20 flies/trap; Jonesboro = 4-6 flies/trap).  As of last week we have not detected any SWD in fruit samples. We will be sampling the traps and fruit again early this week (Aug 26) and let you know what we are finding.  We suspect that fruit infestation will start to occur fairly soon, at least in the Blue Hill area. If you have not harvested your fields yet, please maintain your SWD trapping program.

Please contact David Yarborough or Frank Drummond if you any questions and/or concerns.

 

SWD Update from Frank Drummond – August 13, 2014

Wednesday, August 13th, 2014

SWD adults are still being trapped in single numbers. This suggests that the population has not started to build yet, although it is anticipated that this might occur in the next 7-10 days.  As of yet, we have NOT yet found any wild blueberry fields that have SWD infested berries, although blueberry maggots have been found in fruit.  Most of our sampling has been from Stockton Springs to the Downeast area. Our recommendation is to be vigilant and continue to monitor traps, harvest fields as soon as you can, and protect those crops that will not be harvested for some time providing that SWD has been found in traps in those fields. There are still some fields that have NOT detected SWD yet.

Yarborough Talks to AP about Maine’s Blueberry Crop

Thursday, October 17th, 2013

David Yarborough, a wild blueberry specialist and horticulture professor at the University of Maine, spoke with the Associated Press about this year’s blueberry crop. Yarborough said Maine’s wild blueberry fields for the most part escaped widespread damage from a harmful new fruit fly during the summer harvest, resulting in what is expected to be an above-average crop. Boston Herald, The Bellingham Herald, Brattleboro Reformer, Portland Press Herald, WLBZ (Channel 2) and Boston.com were among several news organizations to carry the AP report.

Spotted Wing Drosophila (SWD) September 3, 2013

Tuesday, September 3rd, 2013

SWD trap captures in Washington County remained steady and similar to last week. At the University of Maine Blueberry Hill Farm, we continue to capture anywhere from 1 to 30 flies per trap; and the proportion of fruit that have SWD larvae appears to be very low (less than 1 %) as we still have not detected any in our fruit samples.   

The harvest is beginning to wind down in many areas; however, if you still have fruit to harvest you should continue to monitor for this pest and protect your fruit if necessary. This is especially true in the southern and mid-coast part of Maine. In these regions fruit infestation is being found and individual trap captures range from 0 – 200 flies / trap with flies being caught in every field that is being monitored.

SWD captures were continuing to build in Michigan’s highbush blueberry fields last week. Most growers were getting very good control with the recommended insecticides, but some growers were suffering a breakdown and getting infested fruit with SWD…THEREFORE, IF YOU HAVE NOT HARVESTED AND SWD CAPTURES ARE BUILDING, YOU SHOULD BE CONSERVATIVE AND PROTECT YOUR CROP UNLESS YOU CAN HARVEST IT IN THE NEXT FEW DAYS.

WE WILL CONTINUE TO MONITOR TRAPS AND CHECK FOR FRUIT INFESTATION THIS WEEK.

NOTE:  Please refer any questions, comments or concerns to Frank Drummond, 1.800.897.0757 (Maine only) or 207.581.2989, frank.drummond@umit.maine.edu or to Dave Yarborough, 1.800.897.0757 or 207.581.2923, davidy@maine.edu.

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

Yarborough Talks to BDN about Bountiful Blueberry Harvest

Monday, August 26th, 2013

David Yarborough, a wild blueberry specialist and horticulture professor at the University of Maine, spoke with the Bangor Daily News for the article “Blueberry harvest looking bountiful.” Yarborough said berry size and yields are “average or above” but warned about the increased presence of the spotted wing drosophila, a fruit fly that attacks blueberries.

Spotted Wing Drosophila (SWD) August 26, 2013

Monday, August 26th, 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

Thursday, August 22nd, 2013

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

Tuesday, August 20th, 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

Monday, August 19th, 2013

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

Tuesday, August 13th, 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.