2/16/2015

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Brown Marmorated Stink Bugs and Common Look-Alikes

Paul BotchDepartment of EntomologyMichigan State University

botchpau@msu.edu

Objective

• Provide identification tips to reliably distinguish the new invasive pest brown marmorated stink bug (BMSB) from look-alike native stink bugs of Michigan.

Life Cycle

[6] Paul Botch, MSU Entomology 2015 MSU Tree Fruit School

2/16/2015

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Seasonal Habitat Use

Order: HemipteraSuborder: Heteroptera

• True bugs

• Key characteristics:• Forewing thickened at base

and membranous at tip (Hemelytra).

• Mouthparts haustellate(tubular).

• Beak arising from anterior part of head.

• Stink Bugs• Family: Pentatomidae

Anatomy of a Stink Bug

Hebert et al. 2014 Hebert et al. 2014

[6] Paul Botch, MSU Entomology 2015 MSU Tree Fruit School

2/16/2015

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Beetles vs. True Bugs

Forewing thickened & shell-like (Elytra).

Forewing thickened at base and membranous

at tip (Hemelytra)

Hemelytron

Pronotum

Head

Hemelytra = “Half sheath”

Piercing Sucking Mouthparts

Hebert et al. 2014

[6] Paul Botch, MSU Entomology 2015 MSU Tree Fruit School

2/16/2015

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Other Identifying Characteristics of Stink Bugs

• Sometimes called “shield bugs”.• Trapezoidal shape.

Other Identifying Characteristics of Stink Bugs

• Sometimes called “shield bugs”.• Trapezoidal shape.

• Antennae: 5 segments.

• Tarsi: 3 segments.

5 segments

3 segments

Other Identifying Characteristics of Stink Bugs

• Sometimes called “shield bugs”.• Trapezoidal shape.

• Antennae: 5 segments.

• Tarsi: 3 segments.

• Defensive secretion from thorax when disturbed.

[6] Paul Botch, MSU Entomology 2015 MSU Tree Fruit School

2/16/2015

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More than 75 species in Michigan

More than 75 species in Michigan

Brown Marmorated Stink BugHalyomorpha halys (Stål)

• Habitat: • Urban structures.• Woodlots.• Weedy riparian habitat.• Agricultural areas.• Feeds on >300 plants.

• Appearance:• Mottled brown.• Alternating dark, light bands on antennae

& legs.• Black & white striping along sides of

abdomen.• Smooth shoulders.• Length 12.0 – 17.0 mm.

[6] Paul Botch, MSU Entomology 2015 MSU Tree Fruit School

2/16/2015

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Brown Marmorated Stink BugHalyomorpha halys (Stål)

• Habitat: • Urban structures.• Woodlots.• Weedy riparian habitat.• Agricultural areas.• Feeds on >300 plants.

• Appearance:• Mottled brown.• Alternating dark, light bands on antennae

& legs.• Black & white striping along sides of

abdomen.• Smooth shoulders.• Length 12.0 – 17.0 mm.

♂ ♀

“Brown Stink Bugs”Euschistus spp.

• Genus of brown stink bugs includes:

• The Brown Stink Bug, Euschistus servus (Say).

• The Dusky Stink Bug, Euschistus tristigmus (Say).

• The Onespotted Stink Bug, Euschistus variolarius

(Palisot de Beauvois).

• 7 species total in Michigan.

• Habitat:

• Meadows, golden-rod, mullein, woodlots.

• Appearance:

• No banding on antennae or legs.

• Rounded or pointed shoulders.

• Length 8.0 – 15.0 mm.

“Brown Stink Bugs”Euschistus spp.

• Genus of brown stink bugs includes:

• The Brown Stink Bug, Euschistus servus (Say).

• The Dusky Stink Bug, Euschistus tristigmus (Say).

• The Onespotted Stink Bug, Euschistus variolarius

(Palisot de Beauvois).

• 7 species total in Michigan.

• Habitat:

• Meadows, golden-rod, mullein, woodlots.

• Appearance:

• No banding on antennae or legs.

• Rounded or pointed shoulders.

• Length 8.0 – 15.0 mm.

Euschistus spp. BMSB

[6] Paul Botch, MSU Entomology 2015 MSU Tree Fruit School

2/16/2015

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Spined Soldier BugPodisus maculiventris (Say)

• Habitat: • Meadows and goldenrod.

• Feeds on caterpillars and bees.

• Appearance: • Pointed shoulders.

• Two dark spots near apex of hind femur.

• Length 8.5 - 13.0 mm.

Spined Soldier BugPodisus maculiventris (Say)

• Habitat: • Meadows and goldenrod.

• Feeds on caterpillars and bees.

• Appearance: • Pointed shoulders.

• Two dark spots near apex of hind femur.

• Length 8.5 - 13.0 mm.

P. maculiventris BMSB

Paiero et al. 2013

Coenus delius (Say)

• Habitat: • Grasses and herbaceous

plants.

• Appearance:• Grayish-brown coloration.

• Short corium.

• Length 8.5 – 10.5 mm.

Paiero et al. 2013

[6] Paul Botch, MSU Entomology 2015 MSU Tree Fruit School

2/16/2015

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Coenus delius (Say)

• Habitat: • Grasses and herbaceous

plants.

• Appearance:• Grayish-brown coloration.

• Short corium.

• Length 8.5 – 10.5 mm.

C. delius BMSB

Rough Stink BugBrochymena quadripustulata (Fabricius)

• Habitat: • Variety of trees, herbaceous plants,

grasses.

• Appearance:• Cryptic bark-like coloration.• Legs with white bands.• Banding on sides of abdomen.• Margin of pronotum distinctly

toothed.• Length 10.0 - 18.0 mm.

Rough Stink BugBrochymena quadripustulata (Fabricius)

• Habitat: • Variety of trees, herbaceous plants,

grasses.

• Appearance:• Cryptic bark-like coloration.• Legs with white bands.• Banding on sides of abdomen.• Margin of pronotum distinctly

toothed.• Length 10.0 - 18.0 mm.

B. quadripustulata BMSB

[6] Paul Botch, MSU Entomology 2015 MSU Tree Fruit School

2/16/2015

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Holcostethus limbolarius (Stål)

• Habitat: • Meadows.

• Feeds on herbaceous plants, grasses, fruit trees.

• Appearance:• Pale margin of pronotum and

abdomen.

• Similar in appearance to other brown stink bugs (Euschistus spp.).

• Length 7.0 – 9.0 mm.

Paiero et al. 2013

Holcostethus limbolarius (Stål)

• Habitat: • Meadows.

• Feeds on herbaceous plants, grasses, fruit trees.

• Appearance:• Pale margin of pronotum and

abdomen.

• Similar in appearance to other brown stink bugs (Euschistus spp.).

• Length 7.0 – 9.0 mm.

H. limbolarius BMSB

Menecles insertus (Say)

• Habitat: • Forested areas.

• Feeds on deciduous trees.

• Appearance: • Oval and flattened appearance.

• White strip cuts pronotumlengthwise.

• Length 12.0 – 14.0 mm.

[6] Paul Botch, MSU Entomology 2015 MSU Tree Fruit School

2/16/2015

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Menecles insertus (Say)

• Habitat: • Forested areas.

• Feeds on deciduous trees.

• Appearance: • Oval and flattened appearance.

• White strip cuts pronotumlengthwise.

• Length 12.0 – 14.0 mm.

M. insertus BMSB

What Else Can Be Mistaken For BMSB?

• Western Conifer-Seed Bug, Leptoglossusoccidentalis (Heidemann).• Family: Coreidae

• Boxelder Bug, Boisea trivittata (Say).• Family: Rhopalidae

http://bugoftheweek.com/blog/2013/9/13/the-gathering-storm-brown-marmorated-stink-bug-ihalyomorpha-halysi

Pop Quiz!

A CB

E

D

F G

[6] Paul Botch, MSU Entomology 2015 MSU Tree Fruit School

2/16/2015

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BMSB Identification

Native Stink Bug BMSB

Striped Antennae

BMSB Identification

Native Stink Bug BMSBStriped Legs

BMSB Identification

Native Stink Bug BMSBSmooth Shoulder

Margins

[6] Paul Botch, MSU Entomology 2015 MSU Tree Fruit School

2/16/2015

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BMSB Identification

Native Stink Bug BMSB Smooth Shoulder Margins

BMSB Identification

Native Stink Bug BMSB

Smooth shoulders

Toothed shoulders

Paiero et al. 2013

BMSB Identification

Native Stink Bug BMSB

Rounded Shoulder Apex

[6] Paul Botch, MSU Entomology 2015 MSU Tree Fruit School

2/16/2015

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BMSB Identification

Native Stink Bug BMSB

Shield or Trapezoidal Shape

BMSB Identification(Size Matters)

BMSB Identification

[6] Paul Botch, MSU Entomology 2015 MSU Tree Fruit School

2/16/2015

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References

• Swanson, D.R. 2012. An updated synopsis of the Pentatomoidea (Heteroptera) of Michigan. The Great Lakes Entomologist. 45: 263- 311.

• Hebert et al. 2014. Field guide to stink bugs of agricultural importance in the United States. Second Edition. Virginia IPM Program.

• Paiero, S.M., S.A. Marshall, J.E. McPherson, and M.-S. Ma. 2013. Stink bugs (Pentatomidae) and parent bugs (Acanthosomatidae) of Ontario and adjacent areas: A key to species and a review of the fauna. Canadian Journal of Arthropod Identification. 24: 1-183.

Questions?

[6] Paul Botch, MSU Entomology 2015 MSU Tree Fruit School