Brown Marmorated Stink Bug populations still building

Another pest that we are actively monitoring using clear sticky traps and pheromone lures is the Brown Marmorated Stink Bug. This stink bug is known to feed on vegetables, grain crops, small fruit and tree fruit.

BMSB adults on sticky trap

While we are actively monitoring for this pest in eight counties, Adams, Athens, Greene, Seneca and Wayne counties are seeing trap catch increases, mostly related to adults. Late stage nymphs and adults pose the biggest threat to tree crops like apples, with their damage resembling several other types of injury such as hail injury or bitter pit (stink bug surface injury (L), internal injury (R); Celeste Welty).

Stink bug injury on apple, courtesy of Celeste Welty

Soon these adults will migrate from the fields to structures to seek refuge from the cold temperatures as they attempt to over-winter. If you have lived in Ohio for the past few years, you are no doubt familiar with these large brown stink bugs that invade your home or office in the fall.

While we only have established thresholds for this pest in apples, these were established in the mid-Atlantic and have not been vetted in Ohio yet. We would expect these thresholds to work well in Ohio but research has not been conducted to confirm the results. Monitoring strategies for vegetables, grapes and small fruit can be found here: https://www.stopbmsb.org/managing-bmsb/management-by-crop/

The monitoring system in apples requires two traps, one placed at the edge of an apple block and one placed in the interior. When the cumulative weekly total of both trap catches exceeds 10 stink bugs, an alternate row middle spray for BMSB may be justified. The details are outlined in this article: https://www.stopbmsb.org/stopBMSB/assets/File/BMSB-in-Orchard-Crops-English.pdf

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