{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T17:04:59Z","timestamp":1790701499009,"version":"4.1.0"},"reference-count":71,"publisher":"Oxford University Press (OUP)","funder":[{"name":"USDA-ARS","award":["3060\u201321000-047-000D"],"award-info":[{"award-number":["3060\u201321000-047-000D"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>The red sunflower seed weevil (RSSW), Smicronyx fulvus LeConte, is a key pest of cultivated sunflower in the Northern Great Plains. Larval feeding on the achenes can cause a significant reduction in final oil yield and test weight. A previous study has shown that RSSW feeding damage significantly decreases with increasing distance from the field edge; however, that study was conducted in situations where RSSW population densities were relatively low. Recently RSSW populations have been 10 to 200 times the threshold (4 to 12 RSSW head\u22121) in South Dakota. Thus, mature sunflower heads were taken from 10 central South Dakota fields at 7 distances ranging from 0 to 200 m in 2024 and 2025. Subsamples were taken for X-ray analysis of RSSW feeding damage, calculation of test weight, and determination of oil content. RSSW feeding damage was greatest in the 10 m nearest the edge. RSSW feeding explained at least half of the variability in sample oil content and test weight. From the results, the following conclusions may be drawn: first, the edge effect is still present when RSSW populations are very high and scouting must account for this dispersion; second, fields with a high edge to area ratio may have more damage and grouping fields together may have a protective effect; third, limited area treatments (eg insecticide applications) may be effective under certain conditions.<\/jats:p>","DOI":"10.1093\/jee\/toag301","type":"journal-article","created":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T11:51:41Z","timestamp":1789127501000},"source":"Crossref","is-referenced-by-count":0,"title":["Dispersion of red sunflower seed weevil damage in commercial sunflower fields"],"prefix":"10.1093","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2980-6182","authenticated-orcid":false,"given":"Jeffrey D","family":"Cluever","sequence":"first","affiliation":[{"name":"Edward T. 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