Scolytus


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Scolytus

 

a genus of beetles of the family Scolytidae. They live predominantly on deciduous trees (one species, on the larch). The body measures from 1.5 to 7 mm long. Members of Scolytus, as do all the Scolytidae, live under the bark of trees and bore tunnels in the phloem and even in the sapwood. When there is mass reproduction, the beetles weaken and sometimes completely destroy the trees. There are approximately 200 species distributed in the temperate zone of the northern hemisphere. In the USSR there are about 50 species, predominantly in the south of the European part and in the Far East (in Primor’e). A number of species are dangerous pests of forests and orchards: the birch-bark beetle (S. ratzeburgi) and species that develop on the elm (S. scolytus, S. multistriatus).

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Lack of evidente for pheromonemediated secondary attraction in the fir engraver, Scolytus ventralis (Coleoptera: Scolytidae).
2010), mientras que para los generos Scolytus e Ips se reportan 16 y 9 especies respectivamente; no obstante, hay generos, como Pseudothysanoes o Pityophthorus, representados por mas de 50 especies (Atkinson 2014).
Infectivity of eight species of entomogenous fungi to the larvae of the elm bark beetle, Scolytus multistriatus (Marsham).
On the biology of the bark beetle Scolytus nitidus Schedl (Coleoptera: Scolytidae) attacking apple orchards.
Attraction of Scolytus unispinosus bark beetles to ethanol in water-stressed Douglas fir branches.
Host resistance to the fir engraver beetle, Scolytus ventralis (Coleoptera: Scolytidae) 4.
Abundance of the fir engraver, Scolytus ventralis, and the Douglas-fir beetle, Dendroctonus pseudotsugae, following tree defoliation by the Douglas-fir tussock moth, Orgyia pseudotsugata.
Atkinson, especialista en taxonomia de la subfamilia Scolytinae, que reviso la coleccion entomologica con la finalidad de examinar las colectas de los ultimos anos y corroborar las identificaciones realizada por los investigadores de la seccion de Parasitologia Forestal, encontro a estos ejemplares etiquetados como Scolytus sp., que al analizarlos con detenimiento correspondieron a la especie Scolytus schevyrewi Semenov que era una especie exotica de origen asiatico, encontrada por primera vez en Mexico.
Durante el siglo XX se han introducido de Asia a EUA varias especies de escarabajos de la subfamilia Scolytinae y algunas de ellas se han dispersado a Mexico, como es el caso de Scolytus multistriatus (Marsham), que fue colectado por primera vez en el ano de 1986 en Ulmus parviflora Jacq., en areas urbanas de Ciudad Juarez, Chihuahua (Cibrian et al.
Scolytus schevyrewi es originario de China y Asia central; al igual que Scolytus multistriatus, tambien es vector de la enfermedad de olmos causada por el hongo Ophiostoma novo-ulmi Brasier (Negron et al.
Components of moribund American elm trees as attractants to elm bark beetles, Hyluropinus rufipes and Scolytus multistriatus.
keleri Gunther 1974 as a new record for the insect fauna of Iran from the galleries of the almond bark beetle, Scolytus amygdali Guerin-Meneville 1847.