Beetle frass as plant fertilizer?

So I've been saving my beetle frass to add to new batches of flake soil (I figured it can help seed the batch with microorganisms) but now I have a huge surplus of the stuff. 

I'm not sure if this is a thing but can you use beetle frass as a plant fertilizer like how worm castings are used? I'm not sure if beetle frass has been analyzed to assess the "nutritional value".

 
I think all frass can be used as fertilizer, I pour my Saturniidae frass into different plants when it's possible. Beetles shouldn't be much different.

 
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