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Home > Plants, Pests & Pest Control > Insects & Pests > Brown Marmorated Stink Bug

Brown Marmorated Stink Bug


Life stages of the brown marmorated stink bug Figure 1: Life stages of the brown marmorated stink bug (adult [1]; eggs [2]; nymphs [3-7]). Photo credit: Kent Loeffler, Photo Lab, Dept. of Plant Pathology, Cornell University

Adult brown marmorated stink bug Figure 2: Coloration of adult brown marmorated stink bug; marbled-brown body with dark and light banding on antennae and edge of abdomen. Photo credit: Pennsylvania Dept. of Conservation & Natural Resources, bugwood.com

Scientific name: Halyomorpha halys

History:

  • Originally from China, Korea and Japan.
  • First identified in the U.S. in Pennsylvania in 2001; however, it was likely there since the mid-1990's. It has since been reported from at least several mid-Atlantic states and Oregon.
  • Spreads to new areas by flying and by acting as a stowaway on shipping containers or vehicles, where they aggregate to spend the winter.
  • First identified in Minnesota in November 2010 in Ramsey County; it has since been identified in Anoka, Hennepin, Washington and Winona counties.

Description:

  • Adults: ½-inch-long, shield-shaped, and "marbled" brown in color (figs. 1.1 & 2).
  • To distinguish adults of this pest from other brown stink bugs, look for the alternating black and white color pattern on the margins of the abdomen, and the dark-colored antennae with light-colored bands (see red arrows in fig. 2).
  • Eggs: white to light green in color, barrel-shaped, and laid in clusters of 20 to 30 eggs on the underside of leaves (fig. 1.2).
  • Nymphs: have red and orange markings. They spend the first few days on the egg cluster (fig. 1.3) and later disperse. As the nymphs age, their coloration darkens (figs. 1.4-1.7).
  • Life cycle: One generation per year. Overwintered adults emerge in March-April and produce offspring in June. Nymphs are present during summer and molt into adults. Autumn adults feed until September-October, and then seek overwintering sites (Based on observations from New Jersey).

Impacts:

  • Feeds on the fruits, leaves, stems and seeds of a wide variety of plants and is known as a pest of fruit trees, vegetables and soybeans.
  • Initial reports of damage to plants were minimal in the U.S. However, a growing number of reports from eastern states indicate this pest is causing significant crop damage, especially in orchards.
  • Feeding results in necrotic spots on fruits and leaves, and in deformation of fruits.
  • Common nuisance pest in houses and other buildings, much like the boxelder bug and multicolored Asian lady beetle.
  • Release a foul-smelling odor when disturbed.

Innovative Detection - Swimming pools can be used to detect the brown marmorated stink bug

More Resources



Minnesota map showing confirmed detections of brown marmorated stink bug as of March 12, 2013

U.S. Brown Marmorated Stink Bug Finds

 

Brown Marmorated Stink Bug Control Options for Homeowners

The brown marmorated stink bug (BMSB) is known to occur in Minnesota, and was found invading homes in small numbers (one or two bugs per home) in the winter of 2010/2011. Like most other invasive species, it is expected that populations and associated impacts will increase. Below is a summary of tactics for homeowners to use if considering control of BMSB. This information was derived from publications by various university extension services on BMSB and similar home invading pests.

  1. The first step is to try to prevent BMSB from entering the home. It is recommended that homeowners seal up any cracks or holes through which BMSB might enter the house. This might include replacing weather stripping around doors or windows, replacing or repairing torn screens, caulking cracks, sealing areas where utility lines, phone and TV lines, outdoor faucets and similar things enter homes, or placing a fine wire mesh over vents with large openings. Exclusion of BMSB would be the same as it would be for boxelder bugs.
  2. If BMSB enter the home, they can be disposed of in various ways. One example would be to brush them into a cup of soapy water. Alternatively, a vacuum cleaner can be used to capture BMSB; however, it is advised that the bugs be disposed of immediately to prevent them from stinking up the canister. Recommendations for a similar home invader, the multicolored Asian lady beetle, include placing a nylon stocking, or something similar, over the hose of the vacuum to capture the bugs and prevent them from entering and stinking up the canister of the vacuum. The stocking can then be tied up and disposed of.
  3. In situations with overwhelming BMSB infestations that cannot be mitigated by other methods, pesticide applications to the exterior of the home/building might be considered. Several pesticides are known to be effective at killing BMSB, and if applied at the appropriate time and place may prevent the pest from entering homes. The benefits of potential reductions in the number of BMSB entering the home should be weighed against the potential human health and environmental risks of using pesticides in close proximity to living quarters. Treating a home with a pesticide to control BMSB can be very challenging for a homeowner. One option to consider is hiring a licensed pesticide applicator.
  4. Interior applications of pesticides are generally not advisable.

 

If you suspect you have seen this pest or an infestation in Minnesota, Contact the Minnesota Department of Agriculture

"Arrest the Pest"
1-888-545-6684 (toll free)
Arrest.the.Pest@state.mn.us

Figure 1.1. Adult Brown Marmorated Stink Bug Figure 1.2. Brown marmorated stink bug eggs Figure 1.3. Brown marmorated stink bug nymphs Figure 1.4. Brown marmorated stink bug nymph Figure 1.5. Brown marmorated stink bug nymph Figure 1.6. Brown marmorated stink bug nymph Figure 1.7. Brown marmorated stink bug nymph