Found in large number on a Laburnum, decimating the leaves
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Could you provide a bit more information, e.g. how big, what colour, were they hairy, were there lots on one leave or more scattered, etc. Thanks.
Entomologist and biological recorder
They are around 8-10 mm in length, not hairy, dark green to brown in colour with black markings down middle of back. There are lots on each leaf.
This looks very much like a leaf beetle (Chrysomelidae) larvae, but I don't know of one which feeds on Laburnum.
The larvae look very much like those of Pyrrhalta viburni (Guelder Rose Leaf Beetle). These really do decimate their foodplant. Could it be that the larvae are on a type of Viburnum?
Yes it is a Viburnum, i'd mis-heard and am not too hot on my plant IDs
Lat/Lng: 52.4, -2.2
OS grid ref: SO9185