Entomologist here, with a focus on insect life cycles and ecology.
White grubs and June bugs are two different stages of the same insect's life cycle. White grubs are the larval stage of a type of beetle known as a June beetle, or more specifically, the
June bug. These beetles are part of the
Scarabaeidae family. The adult June bugs are also known as May beetles or simply scarabs.
The life cycle of a June bug typically includes four stages: egg, larva (white grub), pupa, and adult. The grubs feed on the roots of grasses and other plants, and after a period of growth and several molts, they will pupate in the soil. Eventually, the adult beetles emerge, usually in late spring or early summer, which is why they are often associated with the month of June.
So, to answer your question directly:
Yes, white grubs do turn into June bugs, but they are not the same as the adult beetles you might see flying around in June. They are simply an earlier stage in the beetle's life cycle.
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