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Developing a decision-making framework for insect pest management: a case study using Aphis glycines (Hemiptera:

Ashley N Dean1, Jarad B Niemi2, John C Tyndall3

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Pest Management Science
|September 19, 2020
PubMed
Summary

Integrated pest management for soybean aphid profitability depends on outbreak probability and insecticide resistance. Aphid-resistant varieties consistently offer the highest net revenue for farmers.

Keywords:
economic analysisintegrated pest managementmodelingresistance managementsoybean aphid

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Area of Science:

  • Agricultural Economics
  • Entomology
  • Crop Science

Background:

  • Farming profitability is influenced by market value, input costs, and pest resistance, impacting integrated pest management (IPM) strategies.
  • Soybean aphid (Aphis glycines) management is challenged by pyrethroid-resistant populations, affecting yield and farmer revenue.
  • Evaluating pest management tactics requires a framework that considers economic factors and resistance evolution.

Purpose of the Study:

  • To develop a framework for calculating expected yield and net revenue for pest management scenarios.
  • To assess the economic impact of soybean aphid outbreaks and insecticide resistance on farming profitability.
  • To compare the effectiveness of different management tactics, including host-plant resistance and foliar insecticides.

Main Methods:

  • Economic modeling of eight soybean aphid management scenarios in Iowa.
  • Analysis of varying probabilities for aphid outbreaks and pyrethroid-resistant aphid occurrence.
  • Calculation of expected yield and net revenue under different pest pressure and resistance scenarios.

Main Results:

  • Insecticide application is profitable when aphid outbreak probability is at least 29%.
  • Increasing pyrethroid-resistant aphid probability raises soybean production costs.
  • Aphid-resistant varieties yielded consistently and provided the highest net revenue across all evaluated conditions.

Conclusions:

  • The developed framework can assess management tactic profitability and resistance impacts in other crop-pest systems.
  • Incorporating resistance costs into crop budgets aids farmer and consultant decision-making.
  • Strategic decision-making can enhance farmer revenue and mitigate the development of pest resistance.