Col:Chrysomelidae
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Sphaeroderma testaceum (Fabricius, 1775)
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Food Plant: Various Asteraceae, especially Centaurea nigra (Common Knapweed), Cirsium spp. (Thistles), Carduus spp. (Thistles)

Egg: laid singly on the underside of old and new leaves.

Mine: August - April

Notes: The young larvae mine stright into the leaf, feeding beneath the lower epidermis. By the third instar they make full depth mines. The larvae are similar to those of S.rubidum but , unlike this species, hibernate within the leaf. Pupation occurs from March to late July in the soil. A widespread and common species in Britain and Ireland

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