Knapweed Root Moth
Common NameKnapweed Root Moth
Scientific NameAgapeta zoegana
FamilyTortricidae
SubfamilyOlethreutinae
Wingspan (mm)21.5
Primary Colorsyellow, brown
HabitatGrasslands, pastures, disturbed areas, roadsides, and other areas where knapweed species are prevalent.
Geographic RangeNative to Europe and Asia, introduced to North America (USA and Canada) for biological control.
Host PlantsSpotted Knapweed (Centaurea stoebe), Diffuse Knapweed (Centaurea diffusa)
Flight PeriodJune to August
Flight Stylefluttering
Conservation Statusleast-concern
Lifecycle NotesThe larvae are root borers, feeding within the roots of knapweed plants. Pupation occurs within the root or in the surrounding soil, with adults emerging in the summer months.
Identification TipsLook for the striking contrast between the bright yellow forewings and the dark brown markings at the base and outer edge. Its presence is strongly associated with knapweed infestations.
Description
A small moth characterized by its bright yellow forewings, which feature a distinct dark brown basal patch and a broad brown band near the outer margin. The hindwings are typically a uniform grayish-brown.
