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In integrated pest management, the economic threshold is the density of a pest at which a control treatment will provide an economic return. An economic threshold is the insect's population level or extent of crop damage at which the value of the crop destroyed exceeds the cost of controlling the pest. Economic thresholds can be expressed in a variety of ways including the number of insects per plant or per square metre, the amount of leaf surface damage, etc. In many cases, thresholds have been established through scientific research. Because some combinations of pests and crops have not yet been studied, some thresholds are just educated estimates.

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  • In integrated pest management, the economic threshold is the density of a pest at which a control treatment will provide an economic return. An economic threshold is the insect's population level or extent of crop damage at which the value of the crop destroyed exceeds the cost of controlling the pest. Economic thresholds can be expressed in a variety of ways including the number of insects per plant or per square metre, the amount of leaf surface damage, etc. In many cases, thresholds have been established through scientific research. Because some combinations of pests and crops have not yet been studied, some thresholds are just educated estimates. (en)
  • En protection des cultures, le seuil économique d’intervention correspond au niveau de densité de population d'un organisme bioagresseur (agent phytopathogène, ravageur, mauvaise herbe) auquel un traitement phytosanitaire présente un intérêt économique, c'est-à-dire auquel le coût du traitement devient inférieur au coût des dégâts estimés. Déterminer ce seuil revient à comptabiliser ces deux coûts mais le chiffrage du seuil de nuisibilité (niveau d'attaque dont les dégâts sont estimés par leur coût) est parfois difficile car, pour un organisme nuisible, les écologues ne peuvent pas prendre en compte les différents effets (nuisibilité vitale, économique, environnementale, esthétique, commoditaire…), ainsi que la multiplicité et la complexité de ses interactions trophiques et non trophiques. (fr)
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  • In integrated pest management, the economic threshold is the density of a pest at which a control treatment will provide an economic return. An economic threshold is the insect's population level or extent of crop damage at which the value of the crop destroyed exceeds the cost of controlling the pest. Economic thresholds can be expressed in a variety of ways including the number of insects per plant or per square metre, the amount of leaf surface damage, etc. In many cases, thresholds have been established through scientific research. Because some combinations of pests and crops have not yet been studied, some thresholds are just educated estimates. (en)
  • En protection des cultures, le seuil économique d’intervention correspond au niveau de densité de population d'un organisme bioagresseur (agent phytopathogène, ravageur, mauvaise herbe) auquel un traitement phytosanitaire présente un intérêt économique, c'est-à-dire auquel le coût du traitement devient inférieur au coût des dégâts estimés. (fr)
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  • Seuil économique d’intervention (fr)
  • Economic threshold (en)
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