Since its introduction into the United States in the past 10 yr, soybean aphid, Aphis glycinesMatsumura (Hemiptera: Aphididae), has been a damaging pest to soybean, Glycine max (L.) Merrill. During 2008 and2009, fields in central and north central Iowa experienced pockets of high soybean aphid populations. Electroantennograms have shown that soybean aphid alatae are capable of detecting host plant volatiles and sex pheromones. Here, we evaluated baited pan traps as a potential soybean aphid attractant. Yellow pan traps were placed in soybean fields after planting along with lures that contained plant volatiles and sex pheromones in 2008 or sex pheromones only in 2009. Pan trap contents were collected weekly, and plant counts also were conducted. Aphids were identified, and soybean aphids were counted to determine whether one chemical lure was more attractive to spring migrants than other lures. In both years, soybean aphids collected in pan traps with lures were not significantly different from the other products tested.
Table of Contents Chapter 1. General introduction and literature review Thesis Organization Introduction Aphis glycines biology Objectives References Cited Chapter 2. Pan trapping soybean aphids and how it can relate to an outbreak Abstract Introduction Materials and Methods Results Discussion Acknowledgments References Cited Tables Chapter 3. General conclusions Chapter Two Acknowledgments Appendix Chapter 1. General introduction and literature review Thesis Organization This thesis is organized into three chapters. Chapter One contains a general introduction, which includes a literature review on the soybean aphid, Aphis glycines Matsumara (Hemiptera: Aphididae), the transmission of viruses by aphids, the biology of soybean aphids, the background of buckthorn in the United States, sex pheromones in soybean aphids, and the use of pan traps. Chapter
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