#305 Grapevine Beetle (Pelidnota punctata)

02 January 2021

Also known as the spotted June beetle or the spotted pelidnota, is a species of beetle in the family Scarabaeidae (Scarab beetles), situated in the subfamily Rutelinae. Grapevine beetles are common in the north and central United States and eastern Canada, but do relatively little damage to their host plants. The beetles fly at a fast speed, usually in a curving flight.

It lives, like many beetles, in forests, thickets, and woods, and is mostly seen during the summer. Active flyers, these beetles are commonly attracted to lights at night. It is also seen in vineyards and gardens.

The adult beetle eats the leaves and fruit of grapevines, both wild and cultivated, although it is not normally a major pest of vineyards.

Beetle eggs are laid in rotten wood, tree stumps, or on soil near the host plant, where they hatch into larvae, which may grow up to two inches long. Larvae then dig their way into the soil, where they feed on rotted wood. Pupal chambers are built shallowly underground. The adults emerge in July. Its complete life cycle is two years.

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