Integrated Pest Management is not a product — it is a decision framework. IPM asks: what is the pest, what is the economic threshold, and what is the least disruptive intervention that will keep damage below that threshold? Farms that adopt IPM typically cut pesticide use by 30–50% within two seasons while maintaining or improving yield.
The four IPM pillars
Every IPM program rests on four practices, layered from least to most aggressive:
- Cultural controls — crop rotation, resistant varieties, sanitation, planting date adjustment.
- Biological controls — beneficial insects (ladybirds, lacewings, parasitoid wasps), microbial biopesticides (Bt, Trichoderma).
- Mechanical & physical controls — sticky traps, row covers, hand removal, pruning.
- Chemical controls — targeted pesticides used only above the economic threshold, rotated by IRAC/FRAC group.
Economic thresholds beat calendar spraying
Calendar spraying — treating every 7 days regardless of pest pressure — drives resistance and kills beneficials. IPM uses scouting-based thresholds: for aphids on wheat, spray only when populations exceed 5–10 aphids per tiller during grain fill; for whiteflies on tomato, only above 5 adults per leaf.
Under the threshold, the crop tolerates the damage and natural enemies keep the pest in check for free.
Resistance management with FRAC and IRAC rotation
Fungicides are classified by FRAC (Fungicide Resistance Action Committee) codes, insecticides by IRAC codes. Never apply the same code more than twice in a row. Rotating between at least two modes of action every season slows resistance and extends the useful life of each product.
Sanitation is the free half of IPM
Most soil-borne and viral pathogens spread on tools, boots and crop debris. Disinfect pruning shears with 10% bleach or 70% ethanol between plants. Remove and burn diseased plants — never compost them. Rotate solanaceous, cucurbit and cruciferous crops on a minimum 2-year cycle to break disease cycles.
Key takeaways
- IPM stacks cultural, biological, mechanical and chemical tactics in that order.
- Use economic thresholds — spray only when scouting confirms it pays.
- Rotate FRAC/IRAC groups to slow resistance.
- Half of IPM is free sanitation: disinfect tools, remove debris, rotate crops.
Related in the pathology library
Products you can buy for this problem
Typical registered products for the diseases covered in this article, with their active ingredient, mixing rate, spray interval and pre-harvest interval. Rotate FRAC/IRAC groups to avoid resistance.
Insecticidal soap (potassium salts)
Active ingredient: Potassium salts of fatty acids
Neem oil (azadirachtin 1500 ppm)
Active ingredient: Azadirachtin
Imidacloprid 17.8% SL
Active ingredient: Imidacloprid
Lambda-cyhalothrin 5% EC
Active ingredient: Lambda-cyhalothrin
Imidacloprid 17.8% SL (vector control)
Active ingredient: Imidacloprid
Mineral / horticultural oil
Active ingredient: Paraffinic oil 80%
Doses shown are typical registered field rates. Always read the product label, confirm the product is registered for your crop and country, respect the pre-harvest interval (PHI), and wear the protective equipment the label specifies. PlantWatch AI provides agronomic guidance, not a legal spray recommendation.
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