Berberis Sawfly - Arge berberidis
The adult fly is black.
To be found on berberis and mahonia plants.
June to August
Berberis sawfly larvae cause severe defoliation on some berberis and mahonia spp. in Britain. They have a black head on a greyish-white body with yellow blotches and small black dots.
First British record was in Essex in 2002, since when it has been recorded in most southern counties, and has reportedly now reached Yorkshire.
Previously uncommon in Leicestershire and Rutland, its numbers now seem to be increasing.
Leicestershire & Rutland Map
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