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Photo#2034224
Stem borer, Helianthus occidentalis

Stem borer, Helianthus occidentalis
Fish Farm Mounds WMA, Allamakee County, Iowa, USA
September 30, 2017
Stem borer in western sunflower, Helianthus occidentalis. The puparium was spent when I found it on 30 September, indicating that this species feeds and pupates in the stem and emerges as an adult all in the same growing season.

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Stem borer, Helianthus occidentalis Stem borer, Helianthus occidentalis