|scientific name Helicoverpa zea |
common name Corn Earworm, Tomato Fruitworm, Bollworm
Ubiquitous in open areas, esp. in croplands.
Adults are on the wing in late August - September.
A medium-size (3.5-4.5 cm. wingspan) olive-green (males) or olive-brown brown (females) moth. The orbicular is faint and round with a dark pupil, the reniform more prominent and darker. Normal lines are marked by a series of dark dots, and the forewing terminal area is lighter than the remainder of the wing. Hindwings are white with a discal crescent and a wide dark terminal band containing a small pale patch midway along the margin. The green color of the male fades in older museum specimens.
A very widespread pest species on a wide range of crops. Alberta lies at the northern edge of it's huge range, and there are only a handful of records from southern Alberta. It occurs in Alberta only as a fall immigrant from the south. Adults are mainly nocturnal and come to light. Like other members of the family, the larvae feed mainly on the buds, flowers and developing fruiting bodies of plants, including corn ears, tomatoes, and other vegetable crops.
None. Elsewhere a major agricultural pest.
No Alberta data. Elsewhere a vast number of wild and cultivated plants. As the common names imply, a pest on corn, tomatoes and cotton.
Across southern Canada from Nova Scotia to BC, south to Argentina and Chile. In Alberta, recorded as an immigrant north to Dry Island Buffalo Jump Provincial Park in the Red Deer River valley.
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