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Effects of Planting Date and Soil Water on Infestation of Sunflower by Larvae of Cylindrocopturus adspersus

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Abstract:

Plant population had no significant effect on the infesation level of Cylindrocopturus adspersus (LeConte) larvae infesting the stalks of cultivated sunflower under dryland conditions. However, the mean number of larvae per plant was significantly (5% level) reduced by both delayed planting dates and reduced preplant soil water. Delayed planting dates also significantly reduced the avg number of larvae per plant and percentage infestation in irrigated sunflower. Application of insecticide to control adults reduced the number of larvae infesting stalks of irrigated sunflower, reduced plant lodging, and resulted in significant (5% level) increases in both the quantity and the quality of seeds produced in plants that did not lodge.

Document Type: Research Article

Publication date: August 1, 1979

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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