Integrated Pest Management and Control Methods
What IPM actually is
Integrated pest management is a decision process, not a single product. The standard sequence is: inspect and monitor, identify the pest, set an action threshold, prevent the problem through sanitation and exclusion, then combine mechanical, biological, and chemical tactics, and finally evaluate the result. Chemical control is one tool in the sequence - often the last one applied - but IPM does not mean “no pesticides.”
The tactics
- Sanitation: remove food, water, and harborage. This is usually the highest-value step in structural work.
- Exclusion: seal cracks, install door sweeps and screens, repair screens and vents.
- Mechanical/physical: traps, vacuuming, heat, cold, barriers, screens.
- Biological: predators, parasitoids, and pathogens, most often in outdoor and greenhouse settings.
- Chemical: baits, gels, dusts, residual sprays, fumigants, chosen for the site and the target.
Thresholds and resistance
An action threshold is the pest level at which treatment is justified, and it varies by site: a few cockroaches in a warehouse may be tolerable, while the same number in a hospital kitchen is not. Thresholds only work if monitoring is in place. Repeated use of one mode of action selects for resistance, so rotate among IRAC or FRAC groups and never rely on a single product class.
Traps in questions
- Assuming IPM prohibits pesticides, or that it requires a fixed spray schedule. Neither is true; calendar spraying without monitoring is the opposite of IPM.
- Ignoring the evaluation step. Monitoring after treatment is what closes the IPM loop.
Worked example
A school cafeteria reports a few German cockroach sightings. Correct IPM response: place sticky monitors to locate harborage, correct sanitation and moisture, seal cracks, apply gel bait at harborage, follow up with monitoring in two weeks, and document the result. A baseboard broadcast spray is not the first step.