Relationship of Sunflower Planting Dates to Damage by Smicronyx fulvus (Coleoptera: Curculionidae) in North Dakota

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Abstract:

A 4-year (1981–84) planting date study with cultivated sunflower, Helianthus annuus L., showed that damage caused by red sunflower seed weevil, Smicronyx fulvus LeConte, was lowest (6.59%) in 1981 on early planted sunflowers and highest (84.9%) on late planted sunflowers in 1982. Achene weight varied between years and location. Percent oil content of achenes was lowest for late planted sunflowers in 1981 (24.9%) and 1983 (35.7%) and lowest for early planted sunflowers in 1982 (28.8%) and 1983 (31.9%). Planting sunflowers early would reduce achene damage caused by S. fulvus and would not appreciably reduce oil content and achene weight.

Document Type: Research Article

Publication date: February 1, 1987

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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