Viburnum leaf beetle
Species of leaf beetle
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ToursExplore Lably’s 3D toursThe spined soldier bug, Podisus maculiventris is used and developed as a biological control agent against the beetle.
Description
Adult viburnum leaf beetles range from 4.5-6.5 mm in size, while mature larvae are roughly between 10 and 11 mm. It has a brown head, thorax and elytra with dense golden-grey hair on its dorsal surface.
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Life cycle
Viburnum leaf beetles go through one new generation of offspring per year. Eggs are laid throughout the summer and into October. Female beetles burrow into the underside viburnum terminal twigs and create 'spaces' in pith tissue. Then they lay eggs in clusters of 5-6 and cover them with frass. Eggs overwinter in these cavities where they are protected from water loss and predation. Females prefer to place their eggs near where other females have in previous years The eggs hatch by mid-May, after hatching, the larvae feed and grow successively bigger through three instars. Ultimately, they pupate in the soil and emerge as adults in late June or early July.
Host Plants
Both the larvae and the adults consume the leaves of Viburnum species, but at different times of the year, the larvae during the spring, and the adults during the summer. Plants may end up being completely defoliated due to their feeding activities, sometimes resulting in their death. Although, certain species appear to be more preferable to the beetles than others.