Developing Wax-Based Granule Formulations for Mating Disruption of Oriental Beetles (Coleoptera: Scarabaeidae) in Turfgrass

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Oriental beetle, Anomala orientalis Waterhouse (Coleoptera: Scarabaeidae), is a pest of turfgrass that may be controlled by applications of synthetic pheromone (Z)-/(E)-7-tetradecen-2-one to disrupt mating. Laboratory experiments were conducted to determine release profiles of pheromone from experimental wax-based granules, a proprietary wax granule, and rubber septa commonly used in pheromone traps. Rubber septa loaded with 10, 100, and 300 μg per septum provided steady rates of pheromone release (zero-order) over 4 wk of laboratory evaluation (total = 1.1, 9.0, and 26.9 μg/4 wk, respectively). Septa with 1,000 μg per septum had a significant decline in the rate of pheromone release for this 4-wk exposure time (total = 119 μg/4 wk). A large proprietary wax granule (44 mg per granule, 25% wt:wt pheromone) provided a steady rate of pheromone release (total = 2,347 μg/4 wk per granule). Experimental granules (16 mg per granule) made of soywax with higher pheromone loads (10% wt:wt) approached zero-order release (steady state) (total = 69 μg/4 wk per granule), whereas smaller granules (4 mg per granule) with less pheromone (0.1% wt:wt) provided first-order release profiles (decreasing rate with longer exposure time) (total = 0.35 μg/4 wk per granule). A field trial in turfgrass demonstrated the potential of selected granular formulations to provide effective mating disruption for up to 4 wk, as measured by pheromone trap shutdown. Documenting pheromone release profiles for these experimental granules and rubber septa provides valuable information that will support future field evaluations of mating disruption as a control strategy.

Keywords: granule formulation; mating disruption; oriental beetle; soywax; turfgrass

Document Type: Research Article

Publication date: December 1, 2008

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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