Phloeosinus armatus

Reitter, 1887

Phloeosinus armatus is a in the Scolytinae, the largest in its . to the Middle East and eastern Mediterranean, it has been to Italy, Russia, and North America. The species colonizes Cupressus sempervirens (Mediterranean cypress), forming gallery systems on trunks and large branches. It acts as a for phytopathogenic , including Seiridium cardinale, the agent of cypress canker .

Pronunciation

How to pronounce Phloeosinus armatus: //ˌfloʊ.iˈoʊ.sɪnəs ɑrˈmɑːtəs//

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Identification

The largest in Phloeosinus. Distinguished from by size and association with Cupressus sempervirens. Gallery systems show characteristic 'two-arms' longitudinal patterns on trunks and large branches. Identification follow Pfeffer (1995).

Habitat

Cypress stands and forests; specifically colonizes trunks and large branches of Cupressus sempervirens. Found on dead trees, decaying trees in roadside rows, and adult trees in green areas.

Distribution

: Middle East including Iran, Azerbaijan, Syria, Jordan, Lebanon, Israel, Turkey, Greece, and Cyprus. : Italy (first reported 1991, confirmed 2013), Russia (Sochi, Black Sea coast, introduced via infested nursery plants from Italy), and Nearctic areas including the United States.

Diet

; feeds on Cupressus sempervirens (Mediterranean cypress).

Host Associations

Cupressus sempervirens - primary
Seiridium cardinale - fungal causing cypress canker
Geosmithia omnicola - associated isolated from body surfaces and gallery wood chips
Penicillium glabrum - associated isolated from body surfaces and gallery wood chips
Pestalotiopsis hollandica - associated isolated from body surfaces and gallery wood chips
Geosmithia microcorthyli - associated
Cytospora spp. - associated
Epicoccum nigrum - associated
Trichoderma viride - associated

Life Cycle

excavate gallery systems on trunks and large branches. Fertilized females initiate maternal tunnel excavation. Pre-imaginal forms develop within galleries. occurs in gallery chambers. New adults emerge through penetration holes, with visible along trunks and at tree bases.

Behavior

Primary capable of colonizing weakened trees and plants with temporary physiological imbalances. form gallery systems with typical 'two-arms' longitudinal patterns. Acts synergistically with pathogenic microorganisms, actively vectoring that cause cypress canker.

Ecological Role

Pest causing irreversible environmental and landscape damage to cypress plants of naturalistic value. Accelerates transmission of phytopathogenic . Contributes to stress, gradual dieback of aerial parts, shoot death, and reduced growth. Part of complex interactions between and fungal in imbalances.

Human Relevance

Significant pest of ornamental and historically valuable Mediterranean cypress plantings. Causes landscape degradation in regions where cypress is culturally and ecologically important. Management concerns in urban green areas, roadside plantings, and natural cypress forests.