Phloeotribus

Members of Phloeotribus can be recognized as crenulate bark beetles within Curculionidae. Specific identification to species requires examination of morphological characters not detailed in available sources. The genus is distinguished from related scolytine genera by features associated with the crenulate (scalloped or notched) body surface, though precise diagnostic characters are not provided in the source material.

Species occupy diverse habitats corresponding to their host plants. Phloeotribus scarabaeoides occurs in olive groves and orchards. Phloeotribus rhododactylus inhabits areas supporting Cytisus scoparius, primarily in Mediterranean and coastal climates. Phloeotribus liminaris and P. pruni are associated with Prunus species in temperate regions. Species typically colonize stressed, damaged, or recently cut host material.

The genus has a broad distribution with species-specific ranges. Phloeotribus rhododactylus ranges from Spain and southern Sweden/Denmark/Scotland east to Poland, Slovakia, and Hungary, with scattered records in Romania, Bulgaria, and Greece. Distribution records from GBIF include Denmark, Norway, Sweden, and Vermont (USA). Specific distributions for most of the 150+ species are not documented in available sources.

• Olea europaea - hostPrimary host for P. scarabaeoides; beetles feed on phloem tissue and construct breeding galleries in bark
• Cytisus scoparius - hostMain host for P. rhododactylus; beetles infest damaged or stressed plants
• Prunus serotina - hostHost for P. liminaris
• Prunus persica - hostAssociated with P. pruni and tree collapse in Mexico

Males of at least some species (e.g., P. demessus) remain with females during gallery construction and egg-laying. Burrow-blocking behavior has been observed. Species produce chemical attractants including α-pinene, β-pinene, 2-decanone, 2-nonanone, decanal, undecanal, and n-butyl acetate. Attraction to host material varies with branch age, with semi-dried (10-day aged) olive branches being most attractive to P. scarabaeoides.

Several species function as pests of cultivated trees, particularly olives and stone fruits. Phloeotribus scarabaeoides acts as a vector for fungal pathogens in olive trees. The genus serves as host for parasitoid wasps including Cheiropachus quadrum (Pteromalidae) and Dendrosoter protuberans (Braconidae). Population dynamics are influenced by both parasitism and intraspecific competition, with density-dependent regulation occurring primarily through female attack behavior.

Phloeotribus scarabaeoides is a significant pest of olive cultivation in the Mediterranean region, causing damage through feeding gallery construction in living trees and reproduction in pruned logs. Management strategies include insecticide applications (deltamethrin, organophosphorus compounds) and attractant-based lure-and-trap systems using ethylene or acetone extracts. The parasitoid Cheiropachus quadrum has been investigated for biological control but provides only limited population suppression (approximately 20%) due to mutual interference effects.

• ScolytusBoth are scolytine bark beetles with similar gallery construction behavior; Phloeotribus is distinguished by crenulate body surface and different host associations
• ThysanoesShares bigynous mating system in some species; differs in specific host relationships and morphological details
• HylocurusAssociated scolytid genus found in similar habitats but with distinct host preferences and morphological characteristics

• bark beetle
• Scolytinae
• Curculionidae
• olive pest
• Prunus
• Cytisus
• host-specificity
• chemical ecology
• integrated pest management
• biological control

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Optimization of bioassay conditions for the olive bark beetle Phloeotribus scarabaeoides
• The Bark Beetle Phloeotribus rhododactylus (Coleoptera: Curculionidae) Has a Stable Range in Europe
• Response of Parasitoids Dendrosoter protuberans and Cheiropachus quadrum to Attractants of Phloeotribus scarabaeoides in an Olfactometer
• Effect of Olive Branch Aging and Extracts on the Attraction of Olive Neiroun Beetles Phloeotribus Scarabeioides (Bern)
• Chemically-mediated host colonization of black cherry trees,Prunus serotina, by the peach bark beetle,Phloeotribus liminaris(Coleoptera: Scolytinae)
• Effect of parent density on fecundity of two parasitoids [Hym.: Pteromalidae] of the olive beetle,Phloeotribus scarabaeoides [Col.: Scolytidae]
• Deltamethrin application on colonized olive logs: Effect on the emergence of the olive bark beetle Phloeotribus scarabaeoides Bernard 1788 (Coleoptera: Scolytidae) and its associated parasitoids
• The population dynamics of the bark beetle Phloeotribus scarabaeoides (Col., Scolytidae) on European olive (Olea europaea)
• The role of parasitism in the population dynamics of the bark beetle Phloeotribus scarabaeoides (Col., Scolytidae) on European olives (Olea europaea)
• Notes on the breeding biology of some bigynous and monogynous Mexican bark beetles (Scolytidae: Scolytus, Thysanoes, Phloeotribus) and records for associated Scolytidae (Hylocurus, Hypothenemus, Araptus) and Platypodidae (Platypus)
• Effect of the combined treatment of insecticides and an attractant for the control of Phloeotribus scarabaeoides , a pest of Olea europea
• Effects of parasitoid spatial heterogeneity, sex ratio and mutual interference on the interaction between the olive bark beetle Phloeotribus scarahaeoides (Col., Scolytidae) and the pteromalid parasitoid Cheiropachus quadrum (Hym., Pteromalidae)
• Phloeotribus pruni(Coleoptera: Scolytidae) Associated with Peach (Prunus persica) Collapse in Coatepec de Harinas, State of Mexico, Mexico