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Optimal Integrated Strategies to Control an Invasive Weed

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  • Morteza Chalak
  • David J. Pannell

Abstract

type="main" xml:lang="fr"> Bien que la lutte contre les mauvaises herbes en agriculture ait fait l'objet de nombreuses études économiques, peu d'entre elles se sont penchées sur les mauvaises herbes dans les écosystèmes naturels. Dans le présent article, nous avons élaboré un modèle dynamique de simulation stochastique et un modèle dynamique de programmation stochastique pour a) déterminer la combinaison optimale de stratégies de lutte contre la ronce (Rubus anglocandicans) dans les écosystèmes naturels australiens; b) déterminer si une stratégie de lutte intégrée donne des résultats supérieurs ou non à ceux d'une stratégie fondée sur l'utilisation d'herbicides uniquement; c) évaluer l'avantage net de la lutte biologique (la rouille et le broutage par les chèvres); d) déterminer de quelle façon une modification des paramètres du modèle affecte la stratégie de lutte optimale. Bien qu'une stratégie de lutte intégrée combinant des moyens chimiques et non chimiques puisse se révéler optimale dans certains cas, les résultats de notre étude montrent qu'elle n'est pas nécessairement supérieure à une stratégie fondée sur l'utilisation d'herbicides. Les résultats montrent également que le broutage par les chèvres comme moyen de lutte contre la ronce peut être optimal malgré l'incertitude concernant son efficacité. Les décideurs doivent connaître les avantages et les inconvénients des diverses stratégies : certaines stratégies très efficaces peuvent présenter des risques pour l'environnement et pour la santé humaine, tandis que d'autres stratégies moins efficaces peuvent se révéler plus sécuritaires pour l'environnement et pour la santé humaine.

Suggested Citation

  • Morteza Chalak & David J. Pannell, 2015. "Optimal Integrated Strategies to Control an Invasive Weed," Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, Canadian Agricultural Economics Society/Societe canadienne d'agroeconomie, vol. 63(3), pages 381-407, September.
  • Handle: RePEc:bla:canjag:v:63:y:2015:i:3:p:381-407
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    File URL: http://hdl.handle.net/10.1111/cjag.12059
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    References listed on IDEAS

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