Oak-wilt-vector
Guides
Arrenodes
Arrenodes is a monotypic genus of primitive weevils in the family Brentidae, containing only Arrenodes minutus, the oak timberworm. This species is a significant pest of hardwoods in eastern North America, with larvae boring into the xylem of oak, elm, beech, and poplar trees. Adults are sexually dimorphic, with females possessing long slender mouthparts for oviposition and males having broadened mandibles used for combat and courtship. The species has been introduced to the Maritime Provinces of Canada and is regulated internationally due to its potential to vector oak wilt fungus.
Colopterus truncatus
Colopterus truncatus is a sap-feeding beetle in the family Nitidulidae with a broad distribution across the Americas. It has been documented as a seed predator of Inga marginata in Brazil, representing the first record of this trophic interaction. Males produce a species-specific aggregation pheromone composed of polyene hydrocarbons that attracts both sexes, with field activity requiring synergism with fermenting substrates. The species has also been identified as a principal vector of oak wilt fungus in Minnesota, highlighting its significance in both agricultural and forest ecosystems.