Environmental Entomology (1985) 14, 42-44

C.E. Rogers (1985)
Bionomics of Eucosma womonana Kearfott (Lepidoptera: Tortricidae), a root borer in sunflowers
Environmental Entomology 14 (1), 42-44
Abstract: Female Eucosma womonana Kearfott had a preoviposition period of 4.4 ± 0.5 days, after which they laid an average of 236.8 ± 18.1 eggs in the laboratory at 27 ± 2°C. Incubation averaged 6.3 ± 1.5 days. Larvae passed through five stadia in ca. 85.8 ± 6.8 (females) or 86.5 ± 6.9 days (males). The total life cycle for laboratory-reared specimens averaged 106.7 ± 4.7 days. Infestation of roots of sunflowers, Helianthus annuus L., by E. womonana larvae on the High Plains of Texas was significantly reduced in plantings made after late April in 1982 and mid-May in 1983.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
environment - cropping system/rotation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Eucosma womonana	Sunflower (Helianthus annuus)	U.S.A. (mid S)
	Eucosma womonana	Sunflower (Helianthus annuus)	U.S.A. (NE)