Pyrrhalta viburni

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Pyrrhalta viburni (click on image to enlarge it)
Source: Wikimedia Commons

Pyrrhalta viburni (Paykull) - (viburnum leaf beetle)

The beetle attacks Viburnum. It is of Eurasian origin and has been recorded from North America since the late 1970s. The female excavates an opening in the bark of a branch and lays batches of about 8 eggs into the cavity which is sealed with a 'cap'.

The larvae emerge the following spring and feed on the leaves. They may defoliate the virbunum shrubs which can cause death of the plants. Third instar larvae move to the ground and pupate in the soil. There is one generation per year.