Brown Marmorated Stink Bug ( Halyomorpha halys )
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Minnesota First Detectors
Brown Marmorated Stink Bug (Halyomorpha halys)
D. Duerr, USDA Forest Service, Bugwood.org
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Minnesota First Detectors
Outline
History/Distribution
Identification
Life History
Why is it Important? Control
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Minnesota First Detectors
Where in the U.S. are BMSB Most Common?
A. Eastern U.S.B. Upper MidwesternC. Southern U.S.D. Pacific Northwest
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Minnesota First Detectors
History/Distribution
Originally from China
First found in the U.S. in PA in 2001 (1st specimens were actually collected in 1996)
Most abundant in mid Atlantic states
David R. Lance
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Minnesota First Detectors
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Minnesota First Detectors
History/Distribution
BMSB numbers particularly high in eastern U.S. in 2010
Caused economic loss in some crops
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Minnesota First Detectors
History/Distribution
In 2011, BMSB were not consistently high as in previous year
Not in high numbers in MN (yet)
How long before abundance in MN is like eastern U.S.??
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Minnesota First Detectors
History/Distribution
First found in St. Paul (Ramsey Co.) in Nov. 2010 in MDA building
Possibly associated with package received from eastern U.S.
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Minnesota First Detectors
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Distribution in MN:1- Ramsey Co.1- Washington Co.2- Anoka Co.1- Winona Co. 1- Hennepin Co.1- Chisago Co.1- Carver Co.
As of Feb. 2012All were found in homes/buildings
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Minnesota First Detectors
Identification Stink bugs are
shield-shaped Possess large
triangular plate on back
Well developed scent glands
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Minnesota First Detectors
Identification
Possesses piercing-sucking mouthparts
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Minnesota First Detectors
Identification of BMSB
About ½ inch long Mottled brownish
and grayish (marmorated = marbled)
Has banded antennae
Banded abdomen Veins highlighted
in blackWhitney Cranshaw
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Minnesota First Detectors
Identification of BMSB
Metallic greenish gold ‘flecks’ on underside of BMSB
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Minnesota First Detectors
Identification
Young nymphs yellowish brown, mottled with black and red
David R. Lance
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Minnesota First Detectors
Identification
Older nymphs darker, with light bands on dark legs and antennae
Susan Ellis
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Minnesota First Detectors
Don’t Confuse BMSB With…
Boxelder bug
Western conifer seed bug
Other true bugs
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Minnesota First Detectors
Don’t Confuse BMSB With…
Native stink bugs
Native stink bugs
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Minnesota First Detectors
Comparison of insects that might be confused with BMSB
Brown marmorated stink bugs
Native stink bugs
Masked hunter WCSB Squash bug BEB
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Minnesota First Detectors
Which is BMSB?
33%
33%
33%
0 of 30
A B C
A. Insect AB. Insect BC. Insect C
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Minnesota First Detectors
Life History
Overwinter as adults
Emerge about May Between June and
August, lays about 28 eggs at a time on undersides of leaves
Can lay eggs several times
David R. Lance
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Minnesota First Detectors
Life History
Nymphs feed throughout summer
Mature into adults by fall
One generation per year
Gary Bernon
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Minnesota First Detectors
On about how many different kinds of plants does BMSB feed?
25%
25%
25%
25% A. 10B. 20C. 200D. 2000
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Minnesota First Detectors
Why Is It a Pest?
Feeds on 200 + plants Ornamental and
nursery plants, e.g. crabapples, maples, rose, Norway maple, white ash, viburnum, catalpa, hackberry, dogwood, willow, lilac
Gary Bernon
Gary Bernon
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Minnesota First Detectors
Why Is It a Pest?
Nymphs feed shallowly
Adults feed more deeply and cause more severe damage
On leaves generally appears as small stippled areas and/or necrotic areas
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Minnesota First Detectors
Why Is It a Pest?
Can feed directly on fruit and vegetables
Can cause water-soaked lesions, pitting, dimples, catfacing, depressed areas
On vegetables, e.g. beans, can cause warty growths
USDA
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Minnesota First Detectors
Why Is It a Pest?
Crop pest: - Fruit, e.g. apple, peach, grape, raspberry- Ag crops, e.g. soybeans, corn, bean, peas, tomato, pepper
Gary Bernon
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Minnesota First Detectors
Why Is It a Pest?
Nuisance invader in structures in fall, like boxelder bugs and multicolored Asian lady beetles
Has well developed scent glands!! Susan Ellis
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Minnesota First Detectors
Control
Use of insecticides, although control challenging, not always effective This is not long-term
solution Research into possible
biocontrol agent – tiny parasitic wasp that attacks eggs
Susan Ellis