Knowledgebase

Swarming insects in Compost pile #879221

Asked July 29, 2024, 11:36 AM EDT

 Backyard compose bin swarming with bugs.  Seems very unnatural.  I'm concerned.  See bottom of attached photo.

Oakland County Michigan

Expert Response

Hi Myron,

I had spoken with you initially on the MSUE Lawn and Garden Hotline on Monday morning. I sent the below info via email, but am including it here as well in the event that it went to your spam folder. 

I am unable to identify what may be in your compost with the attached images. Occasionally, you may also find a bumble bee nest in compost that isn't turned often. It can be very difficult to get a clear photo of quickly moving insects, but if you are able to get a clearer photo, you can resubmit that. 

Below are resources for composting and insects you may see in your pile. Soldier fly is also a possibility. 

https://www.butlerswcd.org/single-post/compost-critters-and-what-they-can-tell-you

https://www.canr.msu.edu/resources/composting_a_smart_gardening_practice_to_recycle_garden_and_yard_waste


Thank you for your question! Jean P.  Replied July 31, 2024, 9:55 AM EDT
Jean,

I sent a clearer photo yesterday.  I think it may be a Roly Poly/Pill bug.  If so are they okay to have in there.   Please see photo. #0149139     Pease advise.  Myron

From: ask=<personal data hidden> <ask=<personal data hidden>> on behalf of Extension Foundation <<personal data hidden>>
Sent: Wednesday, July 31, 2024 1:55 PM
To: myronstein <<personal data hidden>>
Subject: Re: Swarming insects in Compost pile (#0149139)
 
The Question Asker Replied July 31, 2024, 12:37 PM EDT

Hello,

Thank you for using Michigan State University Extension with your composting question. I see from your second photo that you have a lot of sow or pill bugs. These tiny crustaceans are not really bugs and are decomposers. They only eat dead and decaying organic matter.
They are normal and expected to be seen in a healthy compost pile.
common insects in compost bins
https://thatbackyard.com/the-5-most-common-bugs-youll-find-in-your-compost/
https://www.bioguia.com/sustainablewarriors/home-garden/the-good-the-bad-and-the-ugly-bugs-in-my-compost/

Check out this free online compost training to learn more about what to expect to see happening in your compost bin.

Master Composter Online Course - Gardening in Michigan (msu.edu)
https://www.canr.msu.edu/courses/master-composter-online-course

Thank you for this.  Myron

From: ask=<personal data hidden> <ask=<personal data hidden>> on behalf of Ask Extension <<personal data hidden>>
Sent: Wednesday, August 7, 2024 6:31 PM
To: myronstein <<personal data hidden>>
Subject: Re: Swarming insects in Compost pile (#0149139)
 
The Question Asker Replied August 07, 2024, 4:51 PM EDT

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