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What is this bug?

Discussion in 'Homeowner Helper Forum' started by cinari, Jun 21, 2018.

  1. cinari

    cinari ArboristSite Lurker

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    Noticed a bunch of these on a birch last fall. Have not seen them before or since, but wondering what they are and if there’s anything I should do to prevent them from returning if they are harmful.
     

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  2. PJM

    PJM ArboristSite Operative

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    Yes, that is the larval stage of the multi-colored Asian lady beetle. They are not harmful to your trees but are an annoyance in fall when they seek shelter and invade your home.
     
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  3. cinari

    cinari ArboristSite Lurker

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    Wow, that’s embarrassing. I’m surprised I’ve never seen a ladybug in that stage. Thank you.
     
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  4. Dahmer

    Dahmer Addicted to ArboristSite

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    You aren’t alone, I just learned something new.
     
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  5. JTM

    JTM ArboristSite Guru

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    Never knew that either.
     
  6. ironman_gq

    ironman_gq Addicted to ArboristSite

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    The adult stage bite when you mess with them and they stink when you squish them. Best to deal with them at this stage if possible.
     
  7. Jason Douglas

    Jason Douglas ArboristSite Operative

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    Let us not forget that they're wonderful predatory insects that eat the bad guys. Lacewing larvae look kinda similiar but tend to not be as colorful as the many kinds of lady bugs ones.

    So...don't "deal" with them.
     
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  8. JeffGu

    JeffGu Antagonist/Heckler

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    That looks like Harmonia axyridis and both the larvae and adult eat aphids, scale insects, etc. and are beneficial insects. Be glad you have them.
     
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  9. PJM

    PJM ArboristSite Operative

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    Yes, aside from their nuisance nature getting into homes during the fall, they are mostly beneficial. Neighbor had an aphid infestation on a maple, but these little buggers took care of them.
     
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