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IPM Methods:  Monitoring Techniques & Supplies


Monitoring for insects and diseases and for plant or fruit injury is essential for effective pest management. Knowing what pests are active and when, optimizes pesticide treatments. Regular monitoring provides information on:

  • early warning of potential pest problems
  • which pest life stage is active
  • presence or absence of natural enemies
  • when to implement control measures
  • whether pest control actions are working

How Often to Monitor

From spring through early summer, monitor at least once per week, and then every other week thereafter until late summer. Ideally, scouting should occur on the same day each week. Plan to spend up to an hour, depending on the orchard size, to do a thorough job.

Where to Monitor

Walk sections of the selected block in a diagonal or zigzag pattern.  Randomly select trees, and include at least four trees of each cultivar in a block of 10 acres in size.  The more trees that can be inspected, the better.  Also include trees from the following areas:

  • known hotspots
  • where topography or soil type differs significantly
  • orchard borders

Monitoring Details