ID these larvae? #736538 - Ask Extension


ID these larvae? #736538

Asked January 12, 2021, 3:32 PM EST

These were on a leaf of my red alder tree in 2014. I kept the photo hoping someone could tell me what they are. Can you help me?

Washington County Oregon

Expert Response

The insects are newly hatched Brown Marmorated Stinkbugs (Halyomorpha halys), which is often abbreviated as BMSB. These invasive insects were first identified in Oregon about 10 years ago. They can be significant pests for both agriculture and home gardens, including both vegetables and tree fruits.

For information about BMSB and the beneficial, but tiny, wasp which came along with it, see

Jean R. Natter Replied January 12, 2021, 7:41 PM EST

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