Root-miner
Guides
Agapeta zoegana
sulphur knapweed moth, yellow-winged knapweed root moth, knapweed root moth
A small, bright yellow moth native to Eurasia, introduced to North America in the 1980s as a biological control agent for invasive knapweeds (Centaurea maculosa and C. diffusa). The larva is a root miner that tunnels through the root cortex, causing moderate to considerable damage to host plants. Adults are short-lived, with flight activity from May to August. The species has established populations in western North America and is compatible with other knapweed biocontrol agents.
Aulacobaris
Aulacobaris is a genus of weevils in the family Curculionidae. The genus includes species associated with plants in the Brassicaceae family. Aulacobaris fallax has been studied as a potential biological control agent for dyer's woad (Isatis tinctoria) in North America, though host specificity testing revealed significant non-target risks.
Eteobalea
Eteobalea is a genus of small moths in the family Cosmopterigidae, established by Hodges in 1962. Some authors treat it as a synonym of Stagmatophora. Species in this genus are root miners, with larvae feeding internally on plant roots. Eteobalea serratella has been investigated as a biological control agent for yellow toadflax (Linaria vulgaris) in agricultural systems.
Oberea erythrocephala
Leafy Spurge Stem Boring Beetle, Red-headed Leafy Spurge Stem Borer
Oberea erythrocephala is a slender, elongate longhorn beetle introduced to North America as a biological control agent for leafy spurge (Euphorbia esula). Adults have distinctive red heads, black eyes, and grayish-black hind wings. The species is univoltine and oligophagous, feeding and developing only on certain Euphorbia species in the subgenus Esula. It was approved for release in the United States in 1980 and has since established populations across at least fifteen states and several Canadian provinces. The beetle is considered secondary to Aphthona flea beetles in leafy spurge management due to its narrower host range.
Ophiomyia congregata
Ophiomyia congregata is a species of leaf-miner fly in the family Agromyzidae. The species was described by Malloch in 1913. As a member of the genus Ophiomyia, it is likely associated with stem or root mining in plants, though specific host associations and biological details for this particular species remain poorly documented in available literature.