Posts Tagged ‘Spotted Wing Drosophila’

Fruit Growers Alert 8/9/13: Spotted Wing Drosophila Populations Jump in Coastal Site

Monday, August 12th, 2013
Male Spotted Wing Drosophila

Male Spotted Wing Drosophila, photo by Griffin Dill

Spotted wing drosophila flies were captured in traps in Wells, Cape Elizabeth, Limington, New Gloucester, Gray, Monmouth, Bowdoinham and Corinna this week.

Please visit the Highmoor Farm website for the August 9, 2013 Spotted Wing Drosophila announcement, “Spotted Wing Drosophila Populations Jump in Coastal Site,” where you can subscribe to updates.

Dill, Cooperative Extension Advice Cited in Press Herald Column

Monday, August 5th, 2013

The latest column in the Portland Press Herald’s Maine Gardener series included advice from the University of Maine Cooperative Extension and James Dill, pest management specialist with UMaine Extension. Despite advice from scientists at the Maine Department of Agriculture and UMaine Extension to avoid impatiens this year, the plant has been thriving, according to the column. The article also referenced Dill’s warning earlier this season about the spotted wing drosophila, a new fruit fly that attacks ripening fruit.

Drummond, Yarborough Talk to Media about Blueberry Growing, Harvest

Monday, August 5th, 2013

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

Monday, August 5th, 2013

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.

Fruit Growers Alert 8/2/13: Spotted Wing Drosophila Populations Remain Low

Monday, August 5th, 2013
Male Spotted Wing Drosophila

Male Spotted Wing Drosophila, photo by Griffin Dill

Spotted wing drosophila flies were captured in traps in Wells, Dresden, New Gloucester and Bowdoinham this week. Trap captures continue to be fairly low, with many locations not yet recording any flies.

Please visit the Highmoor Farm website for the August 2, 2013 Spotted Wing Drosophila announcement, “Spotted Wing Drosophila Populations Remain Low,” where you can subscribe to updates.

Fruit Growers Alert 7/26/13: Spotted Wing Drosophila Activity Spreading

Monday, July 29th, 2013
Male Spotted Wing Drosophila

Male Spotted Wing Drosophila, photo by Griffin Dill

Spotted wing drosophila (SWD) flies were captured in traps in Wells, Warren, Dresden, New Gloucester, Monmouth, Union and Lincolnville this week. These trap captures indicate that SWD has become active in more regions of the state.

Please visit the Highmoor Farm website for the July 26, 2013 Spotted Wing Drosophila announcement, “Spotted Wing Drosophila Activity Spreading,” where you can subscribe to updates.

Dill Talks to WLBZ about Fruit Flies

Friday, July 19th, 2013

James Dill, pest management specialist with the University of Maine Cooperative Extension, spoke to WLBZ (Channel 2) about fruit flies and the damage they cause crops. Dill said the flies are attracted to all ripening berries and the only thing he can recommend to combat them are sprays such as synthetic pesticides.

Fruit Growers Alert 7/19/13: Spotted Wing Drosophila Counts are Rising

Friday, July 19th, 2013
Male Spotted Wing Drosophila

Male Spotted Wing Drosophila, photo by Griffin Dill

Spotted wing drosophila flies were captured in traps in Warren (6 males, 3 females) and Wells (2 females) this week in a strawberry field and raspberry field, respectively. These trap captures indicate that this insect is becoming more active in Maine.

Please visit the Highmoor Farm website for the July 19, 2013 Spotted Wing Drosophila announcement, “Spotted Wing Drosophila Counts are Rising,” where you can subscribe to updates.

Strawberry IPM Newsletter No. 7 – July 15, 2013

Tuesday, July 16th, 2013

strawberries

Please visit the Highmoor Farm website for the University of Maine Strawberry Integrated Pest Management Newsletter No. 7, July 15, 2013, “Renovation and Weed Management Issue: Spotted Wing Drosophila, White Grubs Threaten Berries this Summer.”

Highmoor Farm Field Day and Summer Tour will be held on Wednesday, July 31, 2013 from 9:00 a.m. to 4:00 p.m. Registration fee is $20 per person, including lunch, and preregistration is strongly encouraged. For more information, visit the Highmoor Farm website or call 207.933.2100. If you are a person with a disability and will need any accommodations to participate in this program, please call Pam St. Peter at Highmoor Farm, 207.933.2100 or TDD 1.800.287.8957 to discuss your needs at least 7 days prior to this event.

Fruit Growers Alert 7/9/13: Spotted Wing Drosophila Has Been Found In Maine!

Wednesday, July 10th, 2013
Male and Female Spotted Wing Drosophila, Actual Size: 2-3 mm.

Male (left) and Female (right) Spotted Wing Drosophila, photo by Griffin Dill. Actual size: 2-3 mm.

Fruit Growers Alert – July 9, 2013

For full page print version, please see link at the bottom. Click on photos to enlarge.

SPOTTED WING DROSOPHILA HAS BEEN FOUND IN MAINE!

David Handley, Vegetable & Small Fruit Specialist; James Dill, Pest Management Specialist; Frank Drummond, Professor of Insect Ecology/Entomology

Male spotted wing drosophila flies were captured in traps in Dresden and Whitefield on July 3rd in wild blueberry fields. On Saturday, July 6th, a male fly was caught in a Winterport blueberry field. We have traps set out in raspberry and highbush blueberry fields in southern and central Maine, but have not yet captured any spotted wing drosophila in those fields.    However, the presence of spotted wing drosophila in the wild blueberry fields indicates that this insect is now becoming active in the state, slightly earlier than our first captures last year.  Research and Extension staff in Connecticut, Massachusetts, New Hampshire and New York have all reported captures of spotted wing drosophila over the past two weeks, although in all cases the numbers have been low.

Fall Raspberries
Photo by David Handley
Spotted Wing Drosophila Emerging from Fall Raspberries
Photo by James Dill
Raspberries before and after infestation, 48 hours at room temperature after picked.

Spotted wing drosophila (Drosophila suzukii) is a new pest which is a concern for raspberries blueberries and day neutral strawberries, as well as many other soft fruits.  This insect is a small fruit fly, similar to the type that fly around the over-ripe bananas in your kitchen. However, this species will lay its eggs on fruit before it ripens, resulting in fruit that is contaminated with small white maggots just as it is ready to pick.  As a result, the fruit quickly rots and has no shelf life.  This insect first came into Maine in 2011, and caused significant losses in raspberry and blueberry plantings last year.  Spotted wing drosophila can complete a generation in less than two weeks, with each adult female laying hundreds of eggs, so populations can explode rapidly when conditions are right.  This makes them very difficult to control, and frequently repeated insecticide sprays (1 to 3 times per week) are often needed to prevent infestations once the insect is present in a field.  It appears that spotted winged drosophila can successfully overwinter here, although it has not been able to build up to damaging levels until late summer. June-bearing strawberries and early ripening varieties of raspberries and blueberries may escape infestation, but later ripening varieties and everbearing types of strawberries and raspberries will likely become infested if they are not protected. Now that spotted wing drosophila has been confirmed in Maine, growers should be on the alert and look for fruit flies on their fruit and symptoms of premature fruit decay.   Products that provide good control of drosophila on berries include Delegate®, Brigade®, Bifenture®, Danitol®, Mustang Max®, malathion and Assail®. Research carried out at the Connecticut Agricultural Experiment Station suggests that adding table sugar to group 4A insecticides such as Assail®, may improve their effectiveness. The recommended rate would be 1-2 lb. sugar per 100 gallons of spray.   Please check product labels for rates, post-harvest intervals and safety precautions. Keeping the fields clean of over-ripe and rotten fruit can also help reduce the incidence of this insect.  For information on identifying spotted wing drosophila and making your own monitoring traps, visit the Michigan State University’s Spotted Wing Drosophila website.  There is also a good fact sheet series on management of spotted wing drosophila on the Penn State Extension website.

David T. Handley
Vegetable & Small Fruit Specialist

Highmoor Farm                       Pest Management Office
P.O. Box 179                             491 College Avenue
Monmouth, ME  04259         Orono, ME  04473
207.933.2100                          1.800.287.0279

IPM Web Pages:
http://extension.umaine.edu/ipm/
http://www.pestwatch.psu.edu/sweet_corn.htm
http://www.umass.edu/umext/ipm/

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