Capture of Nontarget Flies (Diptera: Lauxaniidae, Chloropidae, and Anthomyiidae) on Traps Baited with Volatile Chemicals in Field-Crop Habitats

Abstract

Volatile chemicals increased trap catch of flies from the families Lauxaniidae [Homoneura bispina(Loew) andCamptoprosopella borealisShewell], Chloropidae (Olcellasp.), and Anthomyiidae (Deliaspp.) in field crops. With lauxaniids, baiting with 2-phenylethanol on cotton-roll dispensers increased catch ofH.bispinain two corn plot tests, and methyl salicylate increased trap catch in one test. Traps baited with methyl salicylate increased the catch ofC.borealis. When using plastic-sachet dispensers, traps baited with methyl salicylate caught moreH.bispinathan ones baited with 2-phenylethanol, whereas traps baited with 2-phenylethanol caught moreC.borealisthan those with methyl salicylate. For chloropids, traps baited with 2-isopropyl-3-methoxypyrazine greatly increased catch ofOlcellaflies in corn and soybean. With anthomyiids, catch of maleDeliaflies in wheat increased with 2-phenylethanol on cotton rolls and with either 2-phenylethanol or methyl salicylate using plastic dispensers. In soybean, 2-phenylethanol formulated on cotton rolls or in plastic dispensers increased catch of maleDeliaflies, but methyl salicylate did not affect trap catch. Trap catch of femaleDeliaflies did not vary among chemicals. In another test in soybean, trap catch of both male and femaleDeliaflies was greater with 2-phenylethanol than with other volatile chemicals.