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Integrated Pest Management Decision Flowchart

Run the IPM Decision Flowchart Fullscreen

About This MicroSim

This interactive flowchart guides students through the Integrated Pest Management (IPM) decision-making process using a vis-network diagram. Starting from a "Pest Detected" node, students follow branching decisions that mirror the real IPM hierarchy: monitoring, cultural controls, biological controls, and targeted chemical controls. Each path reveals the systematic reasoning behind IPM rather than treating it as simply "use less pesticide."

Three real-world pest scenarios are available -- aphids on vegetables, corn borers, and weeds in wheat. Each scenario highlights different control strategies and trade-offs. Terminal nodes display estimated cost, effectiveness, and an ecological impact rating (green, yellow, or red) so students can evaluate the consequences of each decision path.

The flowchart reinforces the idea that IPM is a structured decision process where chemical controls are a last resort, not a first response. By clicking through multiple scenarios, students build procedural knowledge about when and why each control strategy is appropriate.

How to Use

  1. Select a pest scenario from the dropdown menu at the top (Aphids on Vegetables, Corn Borers, or Weeds in Wheat).
  2. Start at the "Pest Detected" node and read the first decision question.
  3. Click on decision branches to follow the IPM hierarchy through cultural, biological, and chemical control options.
  4. Examine the terminal nodes to compare cost, effectiveness, and ecological impact ratings.
  5. Try all three scenarios to see how the decision process adapts to different pest situations.
  6. Note which paths lead to green (low impact) versus red (high impact) ecological outcomes.

Iframe Embed Code

You can add this MicroSim to any web page by adding this to your HTML:

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<iframe src="https://dmccreary.github.io/ecology/sims/ipm-decision-tree/main.html"
        height="647px"
        width="100%"
        scrolling="no"></iframe>

Lesson Plan

Grade Level

9-12 (High School Environmental Science / AP Environmental Science)

Duration

45 minutes

Learning Objectives

  • Apply the IPM decision-making hierarchy to determine appropriate pest control strategies
  • Evaluate the ecological trade-offs of cultural, biological, and chemical pest controls
  • Compare IPM approaches across different pest scenarios and crop systems

Prerequisites

  • Basic understanding of agricultural ecosystems
  • Familiarity with types of pests (insects, weeds) and their impacts on crops
  • Introduction to the concept of sustainable agriculture

Standards Alignment

  • NGSS HS-LS2-7: Design, evaluate, and refine a solution for reducing the impacts of human activities on the environment
  • AP Environmental Science: Topic 5.4 -- Integrated Pest Management

Activities

  1. Warm-Up (5 min): Ask students: "If you found aphids on your tomato plants, what would you do first?" Discuss responses and introduce the concept that IPM follows a specific hierarchy of responses.

  2. Guided Exploration (15 min): Students work through the aphids scenario together as a class. At each decision node, pause and discuss why the flowchart prioritizes monitoring and cultural controls before chemical interventions. Have students note the cost and ecological impact at each terminal node.

  3. Independent Investigation (15 min): Students work in pairs to explore the corn borer and weeds in wheat scenarios. They record in a comparison table: (a) which control strategies are available for each pest, (b) the ecological impact ratings of different paths, and (c) which path they would recommend and why.

  4. Synthesis Discussion (10 min): Groups share their recommended paths. Discuss: Why does IPM use a hierarchical approach? What are the long-term consequences of skipping directly to chemical controls? How does the best strategy differ depending on the pest type?

Assessment Questions

  1. Explain why IPM uses a hierarchical decision process rather than immediately applying pesticides.
  2. For a new pest scenario (Japanese beetles in a rose garden), outline the IPM decision steps you would follow and justify each choice.
  3. Compare the ecological impact ratings of the three scenarios. What patterns do you notice about when chemical controls become necessary?

References

  1. EPA. "Integrated Pest Management (IPM) Principles." United States Environmental Protection Agency. https://www.epa.gov/safepestcontrol/integrated-pest-management-ipm-principles
  2. Kogan, M. (1998). Integrated Pest Management: Historical Perspectives and Contemporary Developments. Annual Review of Entomology, 43, 243-270.
  3. Flint, M.L., & Gouveia, P. (2001). IPM in Practice: Principles and Methods of Integrated Pest Management. University of California ANR Publication 3418.