Byturus tomentosus De Geer 1774 ♂♀ ♥
Common names: Raspberry Beetle [En], Ver des framboises (larva) [Fr], Frambozenkever [Nl]
Hamoir, LIEGE ● Belgium
Description: A couple mating on a flower of Wood Avens (Geum urbanum)
A small beetle, from 3.8-4.3 mm long, of a pitchy-brown colour, clothed with golden-brown pubescence.
The larva – the so-called Raspberry Maggot – is dull yellowish or grey, with brown markings in the middle of all the segments, six jointed legs in front, and the anal segment with a more or less pronounced rudimentary leg and two pointed curved spines; length, 1/3 in.
Biology: Larvae of this beetle are parasites of raspberry flowers (Rubus idaeus). They also feed and lay their eggs in Loganberry and Brambles, and do much harm to the former fruit. They damages flower buds, flowers and fruits. The beetles overwinter in the soil and emerge in spring and feed on young foliage until flower buds develop. The larva lives in the core or receptacle of the berries, where it forms dark tunnels, and later escapes from the fruit, and, if mature, either falls to the ground or gets into any crevice in the canes or stakes.
Distribution: Europe and Asia.
Monitoring raspberry beetle (Byturus tomentosus), Scottish Crops Research Institute
Hanni L., Luik A., Parasitism of raspberry beetle (Byturus tomentosus F.) larvae…, Agronomy Research 4, 2006.
John Weathers (the Editor), 1913. Commercial Gardening Vol3, The Gresham Publishing Company.