Economic Returns to Herbicide Resistance Management in the Short and Long Run: The Role of Neighbor Effects

Michael Livingston, Jorge Fernandez-Cornejo, George B Frisvold

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

A bioeconomic model is used to estimate how managing glyphosate resistance to horseweed affects short-and long-run profits in corn, soybean, and corn-soybean rotation systems. Model results found that resistance management reduces profits in the first year of implementation, but increases profits in the second and subsequent 18 yr. In all three systems, long run gains begin to outweigh short-run costs (and resistance management "pays for itself") by the second year. Over a 20-yr horizon, the estimated annual average profit advantage from managing resistance exceeded158 ha-1 ($64/acre) for corn,137 ha-1 ($55/acre) for corn-soybean, and55 ha-1 ($22/acre) for soybean. Seed immigration from a neighbor's field can reduce these gains, but this reduction is negligible if the neighbor also practices resistance management. If the neighbor did not manage resistance, however, the grower's estimated annual profit advantage fell to roughly123 ha-1 ($50/acre) for corn,60 ha-1 ($24/acre) for the corn-soybean rotation, and virtually zero for soybean. Methods applied in this study identify corn and corn-soybean rotations as cases where resistance management "pays for itself" quickly and significantly, even if the neighbor does not manage resistance. Continuous soybean presents a more challenging case that may require additional programs and incentives to encourage collective resistance management among growers. Even for continuous soybean, however, joint grower-neighbor resistance management can pay for itself within 2 yr. Nomenclature: Glyphosate; horseweed, Conyza canadensis (L.) Cronq.; corn, Zea mays L; soybean, Glycine max (L.) Merr.

Original languageEnglish (US)
Pages (from-to)595-608
Number of pages14
JournalWeed Science
Volume64
Issue numbersp1
DOIs
StatePublished - Jul 1 2016

Keywords

  • Bioeconomic Models
  • Common Property
  • Corn
  • Glyphosate Resistance
  • Horseweed
  • Resistance Management
  • Soybean

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science

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