Pachylobius

LeConte, J.L., 1876

pine weevils

Pachylobius is a of in the , established by LeConte in 1876. The genus contains at least two described : Pachylobius picivorus (pitch-eating ) and Pachylobius stupidus. Species in this genus are associated with coniferous and have been documented as pests of pine in forest .

Pachylobius picivorus - inat 190392019 by {{{name}}}. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Pachylobius: /ˌpækɪˈloʊbiəs/

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Habitat

Associated with pine forests and coniferous environments; Pachylobius picivorus specifically documented in the Georgia Piedmont region in association with pine seedlings.

Distribution

Eastern North America; documented in the Georgia Piedmont for Pachylobius picivorus.

Seasonality

Two peaks annually in the Georgia Piedmont, reflecting responses to temperature and developmental cycles.

Diet

Pine seedlings; Pachylobius picivorus is a documented pest of natural and planted pine seedlings.

Host Associations

  • Pinus - feeds onpine seedlings

Life Cycle

development requires 100-128 days during summer; long-lived with continuous throughout life.

Behavior

Responds to olfactory cues, particularly ethanol and turpentine mixtures (5:1 ratio); less directed response to visual cues compared to related Hylobius pales, with more than 80% of individuals landing at distance from traps and moving toward them rather than direct approach.

Ecological Role

Pest of pine in natural and planted forests.

Human Relevance

Economic pest of forestry operations; damages pine seedlings in natural stands and plantations; subject of trap studies for .

Similar Taxa

  • Hylobius palesBoth are pine-feeding in ; distinguished by behavioral response patterns (H. pales shows more directed response to visual cues and trap entry, while Pachylobius picivorus lands away from traps and toward them).

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