Answer: You are not necessarily doing anything wrong. A compost pile can be a nice breeding ground. There are numerous types of grubs and they come in various sizes depending on the type of beetle. Sometimes turning compost more often and/or using it as soon as it cools rather than warehousing it in the finished state can help reduce the number of them. Covering the pile with a tarp may also help. Screening them and feeding them to the birds is a good solution,too.
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