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Grubs in Compost


January 25, 2016

I've been finding big, pale gray grubs about two inches long and 3/8 thick in my compost pile.  What are they?  Are they harmful and if so how do I control them? What do they hatch out into?


Answer by JZ: I suspect that what you are describing are June beetle larvae - you could do a google search for pictures of them. To the best of my knowledge they are not harmful to the decomposition process, but would be a part of the compost food web.  You would have to research their life cycle.  If  you find them bothersome just remove them, then euthanize them in soap water,  then put them back into the operation as a nitrogenous addition.

A little more research on your part is necessary to ID the larvae.  Then you could get back to us

if you have more questions. Let us know if we can be of more help.

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