Impact of Single Gene and Pyramided Aphid-Resistant Soybean on Movement and Spatial Pattern of Soybean Aphid (Hemiptera: Aphididae)

Obiratanea Da Silva Queiroz, Anthony A. Hanson, Bruce D Potter, Robert L Koch

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1 Scopus citations

Abstract

Host plant resistance may be an effective option to manage soybean aphid, Aphis glycines (Matsumura) (Hemiptera: Aphididae), an important pest on soybean (Glycine max (L.) Merr.) in the U.S. Movement of soybean aphid may be altered by the presence of resistance (i.e., Rag [Resistance to Aphis glycines]) genes in soybean and changes in movement may affect the spatial pattern of a species. This study aims to assess the effects of Rag1 and pyramided Rag1+Rag2 aphid-resistant varieties on movement of soybean aphid under laboratory conditions and to evaluate potential impacts of this movement on spatial pattern of soybean aphid under field conditions. Results from the greenhouse study showed more movement of soybean aphid on both aphid-resistant varieties than the susceptible variety when aphids were placed on unifoliate leaves and no statistically significant difference in movement between Rag1 and pyramided Rag1+Rag2 varieties. When aphids were placed on new growth, movement was greater on pyramided Rag1+Rag2 than the Rag1 and susceptible variety. However, under field conditions, the spatial patterns of soybean aphid in plots with susceptible, Rag1 or pyramided Rag1+Rag2 varieties were aggregated and did not differ among varieties in vegetative and reproductive growth stages. These results are of relevance because they suggest that aspects of soybean aphid management that may be sensitive to changes in spatial pattern of the pest (e.g., natural enemy efficacy and sampling plans) may not be impacted by implementation of varieties with these resistance genes for host plant resistance.

Original languageEnglish (US)
Pages (from-to)2946-2955
Number of pages10
JournalJournal of economic entomology
Volume111
Issue number6
DOIs
StatePublished - Dec 14 2018

Bibliographical note

Funding Information:
We thank the numerous research staff and students who contributed to collection of aphid data in the field and James Menger for assistance with green-house experiments. In addition, we thank Dr. Roger Moon for the statistical support and Dr. William Hutchison for review of an early version of this manuscript and precious suggestions for improvement. Funding for this research was provided by the Minnesota Department of Agriculture and the Minnesota Soybean Research and Promotion Council.

Funding Information:
We thank the numerous research staff and students who contributed to collection of aphid data in the field and James Menger for assistance with greenhouse experiments. In addition, we thank Dr. Roger Moon for the statistical support and Dr. William Hutchison for review of an early version of this manuscript and precious suggestions for improvement. Funding for this research was provided by the Minnesota Department of Agriculture and the Minnesota Soybean Research and Promotion Council.

Publisher Copyright:
© The Author(s) 2018. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved.

Keywords

  • Aphis glycines
  • Taylor's Power Law
  • host plant resistance
  • pyramided resistance
  • sampling

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