Byturus tomentosus

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Hexapoda
Classis: Insecta
Cladus: Dicondylia
Subclassis: Pterygota
Cladus: Metapterygota
Infraclassis: Neoptera
Cladus: Eumetabola
Cladus: Endopterygota
Superordo: Coleopterida
Ordo: Coleoptera
Subordo: Polyphaga
Infraordo: Cucujiformia
Superfamilia: Cleroidea

Familia: Byturidae
Subfamiliae: Byturinae
Genus: Byturus
Species: Byturus tomentosus
Name

Byturus tomentosus (De Geer, 1774)
Synonyms

Dermestes tomentosus De Geer, 1774

References

De Geer, C. (1774) Mémoires pour servir à l'histoire des insectes. Tome quatrième. Stockholm.
Byturus tomentosus (Byturidae) - atlas of beetles of Russia

Vernacular names
čeština: Malinovník plstnatý
Deutsch: Himbeerkäfer
English: Raspberry beetle
suomi: Vattukuoriainen
français: Ver des framboises
polski: kistnik malinowiec
русский: Малинник войлочный / Малинный жук

The raspberry beetle (Byturus tomentosus) is a species of beetles in the fruitworm family Byturidae. It is a major pest that is widespread in north-central Europe, affecting raspberry, blackberry and loganberry plants.

This species is related to the raspberry fruitworm (B. urbanus) which is native to North America.

Behaviour
Byturus tomentosus

The beetles find raspberry flowers using vision and smell[1] and lay eggs on them, which hatch into pale brown larvae. The larvae feed on the developing fruit and cause the fruit to appear smaller and shriveled.[2] The female adult beetles can lay up to 120 eggs. Adult beetles also feed on the leaves of the plant and its flowers. Grown beetles overwinter in the soil below their host plants.[3]
Pest control

Because the larvae are hidden in the raspberry fruit during most growing stages, natural predators do not have a large influence on the beetle population.[3] The raspberry beetle is often controlled by use of derris, a pesticide. Although experts in ecological and organic growing no longer consider derris ecologically sound, Rotenone which is made from derris is still sold in the U.S. Some wild raspberry species are resistant against the beetle larvae.[4]
Economic significance
Raspberry beetle larva on a raspberry

The pest damages both wild and cultivated raspberries and also blackberries. The beetles eat portions of the flowers and young leaflets and lay their eggs between the stamens and pistils. The larvae tunnel in the developing fruit which remain small, become pale in colour, fade or rot. The larvae then drop to the soil and pupate underground. Control measures include digging-over the soil around bushes and inter-row ploughing. Chemical pesticides may be applied at the flowering stage. White sticky traps are sometimes used to catch beetles.[2][5]
References

Woodford, J. A. T., Birch, A. N. E., Gordon, S. C., Griffiths, D. W., McNicol, J. W., & Robertson, G. W. (2003). Controlling raspberry beetle without insecticides. IOBC WPRS BULLETIN, 26(2), 87-92.
"AgroAtlas - Pests - Byturus tomentosus (De Geer) - Raspberry Beetle".
Hanni, L., & Luik, A. (2006). Parasitism of raspberry beetle (Byturus tomentosus F.) larvae in different cropping techniques of red raspberry. Agron. Res, 4, 187-190.
Briggs, J.B.; Danek, J.; Lyth, M.; Keep, Elizabeth (2015). "Resistance to the Raspberry Beetle,Byturus Tomentosus, inRubusSpecies and their Hybrid Derivatives withR. Idaeus". Journal of Horticultural Science. 57 (1): 73–78. doi:10.1080/00221589.1982.11515026. ISSN 0022-1589.
Schmid, Andi; Hoehn, Heinrich; Schmid, Karin; Weibel, Franco; Daniel, Claudia (2006). "Effectiveness and side effects of glue-traps to decrease damages caused by Byturus tomentosus in raspberry". Journal of Pest Science. 79 (3): 137–142. doi:10.1007/s10340-006-0126-9. ISSN 1612-4758. S2CID 23205799.