Butterflies and Moths of North America

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Flax Bollworm Moth
Heliothis ononis (Fabricius, 1787)


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Identification: Forewing light brown with darker reddish-brown scaling at base and on shoulders (tegulae); dark brown median band incorporates large black reniform spot; subterminal band dark, narrower in the middle; fringe reddish-brown; hindwing white with large black discal crescent and broad black terminal band containing pale double spot about midway along outer margin; fringe white
Wing Span: 2.4-2.6 cm
Life History: Eggs are deposited in open flowers of foodplant. Early larval instars feed from within the seedhead on developing seed; later instars feed from outside the seedhead.
Flight: May to July
Caterpillar Hosts: Seeds of flax (Linum spp.)
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Habitat: Grasslands, meadows, agricultural fields, roadsides, clearings
Range: Alaska to Northwest Territories and Manitoba, south to Colorado.
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