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Spotted Wing Drosophila and Brown
Marmorated Stinkbug Update
Lynell K. Tanigoshi & Bev S. Gerdeman
WSU Mount Vernon
Northwestern Washington Research & Extension Center
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Originally from Japan,
Korea, China, highlands of
southeast Asia and foothills of
the Himalayas
SWD was identified by the CDFA in 2008
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Fruits Affected by SWD
Blueberries Grapes
Raspberries Nectarines
Blackberries Asian Plums
Boysenberries Plumcots
Strawberries Elderberry
Cherries Cold Hardy
Peaches Kiwi
Asian Pears Italian Prunes
Figs Persimmons
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Gerdeman
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Spotted Wing Drosophila Adults
Females • Ovipositor easily
observed in traps
•Lack wing spots
Males • Wing spots near
bottom outside edge
• First legs have 2
rows of sex combs.
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Why is SWD so destructive?
Non suzukii ovipositor
D. suzukii ovipositor
highly adapted for cutting.
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Spotted Wing Drosophila Egg Deposition
Gerdeman
Gerdeman
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Spotted Wing Drosophila Life Cycle
Eggs
•Laid in maturing fruit
•Hatches in 12-72 hours
•350+ eggs/female
Gerdeman
Gerdeman
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Eggs
• Laid in maturing fruit
• Hatch in 12-72 hours
• 350+ eggs/female
Respiratory
filaments can be
seen with a 10X
hand lens and
even the naked
eye with training
and sharp
eyesight
Gerdeman
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Larvae
• 3 instars
• 5-7 days
• 3rd instar - wandering
Gerdeman
Gerdeman
Gerdeman
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Spotted Wing Drosophila Life Cycle
Pupae • 3rd instar larval
cuticle hardens
to form puparium
• 4-15 days
Gerdeman
Gerdeman
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Beginning on 9/7/2011 we ran a
weekly series of no-choice field
cage studies where we exposed
cvs. ‘Reisling, Merlot, and
Concord’ to SWD. Eggs and
larva were detected on the
caged fruit at dates near harvest,
but no adults were detected
indicating that SWD did not
complete a generation in
Washington grapes.
These results are nearly
identical to 2010.
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Concord Harvest Date October 31
Date1 Brix TA/I pH Eggs Larva Pupae Adults
9/28 17.8 0.47 3.34 0 0 0 0
10/5 17.8 0.45 3.33 2 0 0 0
10/12 21.8 0.84 3.23 11 0 0 0
10/19 17.9 0.51 3.37 2 0 0 0
10/25 19.2 0.27 3.54 0 0 0 0
1/ Date shown indicates when fruit in cages were exposed to SWD. Cages
were collected 7 days later and fruit was left on the lab bench to permit adult
emergence
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Overview remarks from entomologist, Doug
Walsh, WSU, Prosser, WA.
1. Grapes are not a preferred host and grapes need
to be way overripe before they get attacked by
SWD.
2. Westside grape grower’s viticultural challenge
is just getting the grapes ripe.
3. Simple fact that we do not hear about any
California coastal vineyards getting hit by SWD
leads one to concude that wine grapes are not a
preferred host.
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0
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2010 SWD trap
averages
2011 SWD trap
averages
2010
2010
SWD population trends in blueberry and red raspberry at
the WSU NWREC for 2010 and 2011.
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Summary Insights on SWD Management, 2011
• Monitor ACV traps closely as small fruit approach
ripening/increased fruit ripening volatile/odor cues for SWD
females.
• Critical treatment threshold is first presence of SWD in traps or
fruits (reproductive capacity, eggs in fruit, migration).
• Difficult to clean-up SWD if the first contact, cover applications
is late (e.g. 1-3 days).
• A rescue cover application by helicopter or chemigation can
effectively knockdown immigrating adult SWD at first fruit
ripening.
• With the exception of the neonicotinoids, all of the commercially
registered insecticides are effective contact/stomach poison
chemistries.
1.
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• Good coverage of the foliage and fruit is key for effective
contact activity to prevent egg laying in maturing fruit
(gallonage/ac, pressure and speed).
• Rotate MOA insecticides to delay onset of tolerance and cross-
resistance.
• Apply full labeled rate of each insecticide and consider PHIs and
REIs of each when formulating your pest management program.
• Use enough monitoring traps along perimeter and within-in field
to calibrate each application for immigrating flies from outside
the crop. These observations will provide growers with insights
about the protective residual of each insecticides.
• This knowledge about field residual is critical to SWD
management for not leaving fruit unprotected between rotations.
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Distribution and Host Range of the BMSB
• Brown marmorated stink bug (BMSB ), Halyomorpha halys,
invasive insect native to Japan, Korea, Taiwan and China.
• BMSB officially identified in 2001, Allentown, PA, established
throughout the mid-Atlantic region and officially detected in 30
states.
• Severe pest in PA, NJ, DE, MD, WV and VA. Recorded in OR,
2004 and easily collected in Vancouver, WA, fall of 2010.
• Within Asia, 300 host plant recorded. US surveys identified
apple, plum, peach, pear, cherry, raspberry, blueberry, grape,
pecan, bell pepper, tomato, pole/bush beans, cucumber,
sweet/field corn, soybean ornamental trees and shrubs (maple,
dogwood, crabapple, hawthorne, elm, sycamore, serviceberry
and magnolia.
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Brown Marmorated Stink Bug –
Native Range
Japan, Korea,
Taiwan and
China
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Brown Marmorated Stink Bug –
North America 2001, Allentown
PA
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Report New Infestations
Collect the sample!
Check your ID resources or
drop off at your local
extension office
All new records will be
reported to WSDA
Only known to occur in Clark
and Skamania counties in
Washington State.
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Brown Marmorated Stink Bug Halyomorpha halys (Hemiptera: Pentatomidae)
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Biology
• Overwinter as adults, emerge in spring and begin
mating two weeks later. 1-6 generation/year.
Between 200-500 egg/female.
• Eggs are laid in egg masses/clusters containing
25-30 eggs on the underside of leaves.
• Life stages: egg, 5 instar nymphs (wingless
versions of the adult) and adult (male & female).
• Called stink bugs because they produce a
disagreeable odor from specialized body glands
when disturbed.
• Piercing-sucking mouthparts, slender beak-like
structure.
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Life stages - mid-April to October, WV
Leskey
Leskey
Leskey
Shearer Gerdeman
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Brown Marmorated Stink Bug - Life Cycle
•200-500
egg/female
•Eggs laid
in clusters
of 25-30
•1-2
generations
per year ??
•Up to 6 in
warm
climates
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Brown Marmorated Stink Bug -
Life Cycle
Winter
aggregations
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BMSB feeding damage
Leskey
Leskey
Shearer
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Brown Marmorated Stink Bug –
Damage
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Brown Marmorated Stink Bug –
Hosts
Paulownia
tomentosa
Royal Princess
or Empress
Tree
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Brown Marmorated Stink Bug-Pest
Status
Severe damage in Mid-
Atlantic states in
2009-2010. $37
million in damages to
apple growers in MD,
PA, and WV
20%-100% crop loss
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USDA/ARS AFRS, Leskey 2010
• Pyrethroid Brigade, carbamate Lannate,
organochlorine Thiodan, OPs Lorsban, Malathion,
Cygon and Supracide showed good activity as
direct contact on dried insecticide residues.
• Many newer “reduced-risk” insecticides proved
far less efficacious under laboratory conditions.
• All registered neonicotinoids, Agri-Mek, Beleaf,
Avaunt, Movento, Cyazypyr are not effective.
• Biological control: egg and adult parasitoids
attacked BMSB at less than 5%. China, Trissolcus
species caused 50-80% egg parasitism and adapted
to BMSB. Years away from being implemented.
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Chemical Management
• No system to effectively/reliably monitor BMSB in any
cropping system.
• Newly established invasive pest, insecticides are needed
to manage BMSB on specialty crops in the short term.
• Newer reduced-risk and OP-replacement insecticides are
generally NOT effective against BMSB.
• 2010, no field-based management recommendations.
• Pyrethroids proved problematic because many recovered
after initial knock-down; >33% moribund BMSB
recovered after direct exposure to cyfluthrin.
• Commercial orchards, 80% recovery rate for insecticide
exposure reported.
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Prototype BMSB Monitoring Traps
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Acknowledgments:
Washington State Blueberry Commission
Washington State Red Raspberry Commission
Washington State Strawberry Commission
Northwest Agriculture Research Foundation
Washington State Commission on Pesticide
Registration
Ry Hirdler
Lily Hirdler
Katie Moyer
Charlie Cosler
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Acknowledgments
Todd Murray, WSU Skamania County
Extension
Eric LaGasa, WSDA, Olympia
Chris Looney, WSDA, Olympia
Tracy Leskey, USDA-ARS,
Kearneysville, WV
Peter Shearer, OSU, Hood River
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