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Tansy beetle lifecycle

The Tansy beetles entire lifecycle is based around its namesake plant - Tansy. 

The Tansy beetle has an annual lifecycle but about 5% of over-wintering adults stay underground for a full year, rather than emerging the following spring.

When Tansy beetle numbers are high there may be a tendency to lay eggs on other plants nearby to prevent cannibalism by other Tansy beetles.

Dispersal to colonise new stands of tansy plants is achieved by walking as the beetles are reluctant to use their wings. This dispersion occurs more often in the spring than the autumn and with males moving more frequently than females. Tansy beetles very occasionally fly short distances, but only in the autumn when fully functioning wing muscles are present. 

Tansy beetle lifecycle

Tansy beetle lifecycle