Researches on Population Ecology

, Volume 33, Issue 1, pp 101–113 | Cite as

Density yield relationships and economic injury level model for the Colorado potato beetle larvae on potatoes

  • G. Mailloux
  • M. R. Binns
  • N. J. Bostanian


A three year study revealed that the relationship between the density of Colorado potato beetle larvae per stalk and a decrease in the yield of potatoes can be described by a model comprised of two straight lines. Potato cv. Superior was found to have a damage boundary of 12 larvae per stalk, which is the maximum level of injury or pest density below which no noticeable yield loss occurs. The economic injury level was estimated as a function of larval density in relation to yield, cost of protection, efficacy of treatment, value of the crop and expected harvest in the absence of any loss.

Key Words

economic injury level Colorado potato beetle 


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Copyright information

© the Society of Population Ecology 1991

Authors and Affiliations

  • G. Mailloux
    • 1
  • M. R. Binns
    • 2
  • N. J. Bostanian
    • 3
  1. 1.Service de recherche en phytotechnie, Ministére de l'Agriculturedes Pécheries et de l'AlimentationSaint-Bruno de MontarvilleCanada
  2. 2.Statistical Research, Research Program ServiceAgriculture CanadaOttawaCanada
  3. 3.Saint-Jean-sur-RichelieuAgriculture CanadaSaint-JeanCanada

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