title: Potential for Sulfoxaflor to Improve Conservation Biological Control of Aphis glycines (Hemiptera: Aphididae) in Soybean.
abstract: Soybean aphid, Aphis glycines Matsumura, is one of the most important insect pests of soybean in the north central United States. Management of A. glycines currently relies on applications of broad-spectrum insecticides. However, broad-spectrum insecticides can negatively impact the natural enemies associated with aphids. Selective insecticides, on the other hand, are promising control tactics for reducing the negative impact of insecticide applications. Here, we compared the effects of sulfoxaflor (a new selective insecticide) and broad-spectrum insecticides on A. glycines and predators in a two-year field experiment. We sampled A. glycines and aphid predator populations using visual whole-plant inspection. In addition, sweep-net sampling was performed to monitor predator populations. To evaluate the toxicity of the insecticides on predator populations, laboratory bioassays were performed on Hippodamia convergens Guérin-Méneville, Orius insidiosus (Say), and Chrysoperla rufilabris (Burmeister). Field results showed that sulfoxaflor was as effective as the broad-spectrum insecticide in suppressing soybean aphid populations and was less impactful on predator populations. The laboratory bioassays showed that sulfoxaflor was moderately harmful to O. insidiosus, harmless to slightly harmful to H. convergens, and harmless to C. rufilabris These studies suggest that sulfoxaflor holds promise for improving integration of chemical and biological controls for A. glycines management.
authors.affiliation: Department of Entomology, University of Minnesota, 1980 Folwell Ave., Saint Paul, MN 55108 (aktran@umn.edu; alves011@umn.edu; koch0125@umn.edu).
authors.forename: Anh K
authors.initials: AK
authors.lastname: Tran
authors.affiliation: Department of Entomology, University of Minnesota, 1980 Folwell Ave., Saint Paul, MN 55108 (aktran@umn.edu; alves011@umn.edu; koch0125@umn.edu).
authors.forename: Tavvs M
authors.initials: TM
authors.lastname: Alves
authors.affiliation: Department of Entomology, University of Minnesota, 1980 Folwell Ave., Saint Paul, MN 55108 (aktran@umn.edu; alves011@umn.edu; koch0125@umn.edu) koch0125@umn.edu.
authors.forename: Robert L
authors.initials: RL
authors.lastname: Koch
mesh_terms: D000818:Animals; D001042:Aphids / Q000187:drug effects / Q000254:growth & development; D001517:Coleoptera / Q000187:drug effects / Q000254:growth & development; D020062:Heteroptera / Q000187:drug effects / Q000254:growth & development; D007300:Insect Control; D007313:Insecta / Q000187:drug effects* / Q000254:growth & development; D007306:Insecticides / Q000494:pharmacology / Q000633:toxicity*; D007814:Larva / Q000187:drug effects / Q000254:growth & development; D008910:Minnesota; D009758:Nymph / Q000187:drug effects / Q000254:growth & development; D010572:Pest Control, Biological; D011235:Predatory Behavior / Q000187:drug effects*; D011725:Pyridines / Q000494:pharmacology / Q000633:toxicity*; D013025:Glycine max / Q000254:growth & development; D013457:Sulfur Compounds / Q000494:pharmacology / Q000633:toxicity*
chemical_list: D007306:Insecticides; D011725:Pyridines; D013457:Sulfur Compounds; C560328:sulfoxaflor
keywords: integrated pest management; natural enemy; selective insecticide; soybean aphid