Beetle frass as plant fertilizer?

[Boris The Beetle]

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".

[BensBeasts1]

You could add it to a mix of soil but not just the frass

[kevink]

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.