Weed-seed-predator
Guides
Anisodactylus harrisii
Anisodactylus harrisii is a species of ground beetle in the family Carabidae. It occurs in North America, with records from Canada and the United States. The species belongs to a genus known to include granivorous ground beetles that consume weed seeds.
Harpalus ellipsis
Harpalus ellipsis is a species of ground beetle in the family Carabidae, subfamily Harpalinae. First described by John Lawrence LeConte in 1848, this beetle belongs to one of the largest genera of ground beetles in North America. The genus Harpalus contains numerous species that are primarily granivorous as adults, feeding on weed seeds, while larvae are predatory on soil-dwelling insects. Members of this genus are commonly found in agricultural and disturbed habitats across temperate regions.
Harpalus pensylvanicus
Pennsylvania ground beetle, Pennsylvania Dingy Ground Beetle
Harpalus pensylvanicus is a ground beetle species in the subfamily Harpalinae, distributed throughout North America. Adults are characterized by shiny black elytra with distinct lines, reddish-brown ventral surfaces, and moderate size. The species is a significant weed seed predator in agricultural ecosystems, with documented preferences for small seeds of grasses and broadleaf weeds. It has been observed in cultivated fields, high hayfields, and open habitats, showing attraction to lights. The species occasionally damages ripening strawberries.
Harpalus rufipes
strawberry seed beetle
Harpalus rufipes is a trans-palearctic ground beetle commonly known as the strawberry seed beetle. Adults are active from April through November in temperate regions. The species functions as a significant weed seed predator in agricultural ecosystems, with larvae and adults feeding on seeds of various grasses and agricultural crops. It has been widely studied as a biological control agent for weed management and serves as a host for multiple parasites including the braconid wasp Microctonus caudatus and the gregarine protozoan Clitellocephalus ophoni.