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Strategies for Controling Pests in Perennial Crops: Can Monitoring Replace Pesticides ?

Author

Listed:
  • Jean-Sauveur Ay

    (CESAER - Centre d'Economie et de Sociologie Rurales Appliquées à l'Agriculture et aux Espaces Ruraux - AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement)

  • Olga Bernard

    (UMR PSAE - Paris-Saclay Applied Economics - AgroParisTech - Université Paris-Saclay - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement)

  • Estelle Gozlan

    (UMR PSAE - Paris-Saclay Applied Economics - AgroParisTech - Université Paris-Saclay - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement)

Abstract

Reducing the use of chemical pesticides is a key objective in many countries. Yet environmentally-friendly alternatives usually differ from pesticides in terms of both efficiency and cost, and their adoption by farmers may also depend on neighbouring farmers' strategies, as pests and diseases spread. Focusing on a vectorborne epidemic disease affecting perennial crops, we study the profit maximising strategies of two producers facing an epidemia in their respective plots. On the one hand, using pesticides stops the spatial spread of the disease, at a per-unit private cost, and external costs. On the other hand, monitoring their plots and removing the diseased plants also slows down contagion (depending on the level of prospection), but can never result in full eradication either, because of the disease latency period (asymptomatic plants remain contagious) and imperfect testing. Using a stylized 3-period framework, we investigate the conditions under which full monitoring can arise as a stationary equilibrium, and the implications for public regulation when both environmental externalities and aggregate profit enter the regulator's objective.

Suggested Citation

  • Jean-Sauveur Ay & Olga Bernard & Estelle Gozlan, 2023. "Strategies for Controling Pests in Perennial Crops: Can Monitoring Replace Pesticides ?," Post-Print hal-05306750, HAL.
    • Handle: RePEc:hal:journl:hal-05306750
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