Sunflower, Helianthus annuus L., was planted on 4 and 28 May and 11 and 25 June 1984 to evaluate sunflower development on achene damage caused by seed weevil, Smicronyx fulvus LeConte. Weevil populations were highest on sunflower at anthesis substages R5.5 through R5.9 for all planting dates. Sunflower planted on 25 June sustained a higher percentage of damaged achenes than sunflower planted on the other dates. Sunflower planted on 4 May showed the lowest percentage of achene damage. Mean weevil populations were highest on sunflower planted 11 June when averaged over all plant stages.
Document Type: Research Article
Publication date: April 1, 1986
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.