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Image Subject Name Scientific Name Description
5358595 musk thistle head weevil Rhinocyllus conicus Seedhead of musk thistle (Carduus nutans) showing damage created by the seedhead weevil, Rhinocyllus conicus, that was introduced as a biological control agent for this noxious weed.
5358598 flea beetles Aphthona spp. Adult leafy spurge beetle (originally described as Aphthona cyparissiae), a biological control agent of leafy spurge (Euphorbia esula).
5358599 black leafy spurge flea beetle Aphthona czwalinae Adult black leafy spurge beetle (Aphthona czwallinae), a biological control agent of leafy spurge (Euphorbia esula).
5358600 copper leafy spurge flea beetle Aphthona flava Adult coppery spurge beetle (Aphthona flava), a biological control agent of leafy spurge (Euphorbia esula).
5358601 flea beetles Aphthona spp. Adult leafy spurge beetle (originally described as Aphthona nigriscutis), a biological control agent of leafy spurge (Euphorbia esula).
5358602 leafy spurge stem boring beetle Oberea erythrocephala Adult leafy spurge stem borer, Oberea erythrocephala, a biological control agent of leafy spurge (Euphorbia esula).
5358603 leafy spurge gall midge Spurgia esulae Adult gall midge (Spurgia esulae), a biological control agent of leafy spurge (Euphorbia esula).
5358604 leafy spurge gall midge Spurgia esulae Eggs of the leafy spurge gall midge (Spurgia esulae), a biological control agent of leafy spurge (Euphorbia esula).
5358605 leafy spurge gall midge Spurgia esulae Gall caused by the leafy spurge gall midge (Spurgia esulae), a biological control agent of leafy spurge (Euphorbia esula).
5358606 flea beetles Aphthona spp. Dead stems of leafy spurge (Euphorbia esula) at a site in Montana where leafy spurge flea beetles (Aphthona spp.) were released as biological control agents in 1992.
5358607 knapweed root weevil Cyphocleonus achates Adult root-boring weevil (Cyphocleonus achates), an introduced biological control agent of knapweeds (Centaurea spp.) in North America.
5358609 lesser knapweed flower weevil Larinus minutus Adult lesser knapweed flower weevil (Larinus minutus), a biological control agent of knapweeds.
5358611 UV knapweed seedhead fly Urophora quadrifasciata Female seedhead gall fly (Urophora quadrifasciata), a biological control agent of diffuse knapweed (Centaurea diffusa), on a knapweed flower bud.
5358612 gall flies Urophora spp. Seedhead of diffuse knapweed (Centaurea diffusa), with a gall caused by the larva of the gall fly (Urophora sp.), a biological control agent.
5358614 Toadflax Brocade Calophasia lunula Larvae of the moth Calophasia lunula, a biological control agent of toadflaxes (Linaria spp.) in North America.
5358616 Canada thistle stem mining weevil Ceutorhynchus litura Larvae and damage caused by the Canada thistle stem-mining weevil, Ceutorhynchus litura, a biological control agent.
5358617 Canada thistle stem gall fly Urophora cardui Adult Canada thistle stem gall fly (Urophora cardui), a biological control agent, and a gall caused by the larvae.
5358618 Canada thistle stem gall fly Urophora cardui Gall from Canada thistle (Cirsium arvense), cut open to reveal damage caused by the larvae of the fly Urophora cardui, a biological control agent.
5358620 leaf beetles Galerucella spp. Sprig of purple loosestrife (Lythrum salicaria) covered with leaf beetles (Galerucella sp.), biological control agents introduced to control loosestrife.
5358621 bull thistle gall fly Urophora stylata Adult seedhead gall fly (Urophora stylata), a biological control agent of bull thistle (Cirsium vulgare).
5358623 Mediterranean sage root crown weevil Phrydiuchus tau Adult of the root crown weevil Phrydiuchus tau, a biological control agent of Mediterranean sage (Salvia aethiopis).
5358624 Mediterranean sage root crown weevil Phrydiuchus tau Larvae of the root crown weevil Phrydiuchus tau, a biological control agent of Mediterranean sage (Salvia aethiopis).
5358625 puncturevine seed weevil Microlarinus lareynii Larva of the puncturevine seed weevil (Microlarinus lareynii), a biological control agent of puncturevine (Tribulus terrestris).

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