Comparison of Methods of Infesting Whorl-Stage Corn with Fall Armyworm Larvae

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Abstract:

In tests comparing the effectiveness of 3 methods of infesting whorl-stage corn with Spodoptera frugiperda (J. E. Smith), the modified "Bazooka" proved to be the best method based on resultant visual damage ratings. The "Bazooka" is a device made primarily of Plexiglas, and larvae of fall armyworms can be mechanically dispensed into whorls of corn plants. It was easier and more efficient than using the camel-hair brush or pinning egg masses into the whorl. Infestation of every plant per plot produced higher leaf-damage ratings than infestation of either every 2nd or every 3rd plant/plot. Differences in leafdamage ratings were detected at infestation rates of 10, 20 and 40 larvae/plant. Rates of 20 or 40 larvae/plant should be used to insure adequate infestations at the 10–12 leaf stage.

Document Type: Research Article

Publication date: June 1, 1980

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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