brown marmorated stink bug ( halyomorpha halys )

Minnesota First Detectors

Brown Marmorated Stink Bug (Halyomorpha halys)

D. Duerr, USDA Forest Service, Bugwood.org

Minnesota First Detectors

Outline

History/Distribution

Identification

Life History

Why is it Important? Control

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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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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

Minnesota First Detectors

Minnesota First Detectors

History/Distribution

BMSB numbers particularly high in eastern U.S. in 2010

Caused economic loss in some crops

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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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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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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Identification Stink bugs are

shield-shaped Possess large

triangular plate on back

Well developed scent glands

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Identification

Possesses piercing-sucking mouthparts

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Identification of BMSB

About ½ inch long Mottled brownish

and grayish (marmorated = marbled)

Has banded antennae

Banded abdomen Veins highlighted

in blackWhitney Cranshaw

Minnesota First Detectors

Identification of BMSB

Metallic greenish gold ‘flecks’ on underside of BMSB

Minnesota First Detectors

Identification

Young nymphs yellowish brown, mottled with black and red

David R. Lance

Minnesota First Detectors

Identification

Older nymphs darker, with light bands on dark legs and antennae

Susan Ellis

Minnesota First Detectors

Don’t Confuse BMSB With…

Boxelder bug

Western conifer seed bug

Other true bugs

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Don’t Confuse BMSB With…

Native stink bugs

Native stink bugs

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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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Which is BMSB?

33%

33%

33%

0 of 30

A B C

A. Insect AB. Insect BC. Insect C

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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

Minnesota First Detectors

Life History

Nymphs feed throughout summer

Mature into adults by fall

One generation per year

Gary Bernon

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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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

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

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

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

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

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