The rosemary beetle (Chrysolina americana) originates from southern Europe, it has been widespread in Britain since the mid-1990s. The larvae and adults feed on the foliage of rosemary and related plants.
Scientific name Chrysolina americana
Plants affected Rosemary, lavender, sage, thyme and some other related plants
Main symptoms Foliage eaten where beetles and grubs have been feeding
Most active August-April; adult beetles present throughout the year
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