Explore the principles and practices of integrated pest management (IPM) in horticulture, including identifying common pests, implementing cultural controls, utilizing biological control methods, and minimizing the use of chemical pesticides.
Integrated Pest Management (IPM) in Horticulture
Concise, organized notes for quick reference and deeper study.
| Element | Description |
|---|---|
| Definition | A decision‑making process that uses a combination of cultural, biological, mechanical, and chemical tools to manage pest populations at economically acceptable levels while minimizing risks to humans, non‑target organisms, and the environment. |
| Goal | Preserve crop quality and yield, protect ecosystem health, and reduce reliance on broad‑spectrum pesticides. |
| Core Principle | “Pest management is a continuum” – start with the least disruptive tactics and only add more intensive measures when thresholds are exceeded. |
Monitoring & Scouting
Identification
Establish Action Thresholds
Preventive & Cultural Controls
Control Tactics (applied only if thresholds are exceeded)
Evaluation & Record‑Keeping
| Pest Group | Common Species | Key Damage | Primary IPM Tactics |
|---|---|---|---|
| Insects | • Aphids (e.g., Myzus persicae) • Whiteflies (Bemisia tabaci) • Spider mites (Tetranychus spp.) |
Sap loss, virus transmission, leaf bronzing | – Reflective mulches & row covers – Beneficial insects (lady beetles, predatory mites) – Insecticidal soaps / neem oil (selective) |
| Nematodes | • Root‑knot (Meloidogyne spp.) • Lesion (Pratylenchus spp.) |
Root galls, stunted growth | – Soil solarization, cover crops (e.g., marigold) – Nematicidal biocontrol (e.g., Bacillus firmus) – Fumigants only as last resort |
| Fungi | • Powdery mildew (Erysiphe spp.) • Botrytis (B. cinerea) • Phytophthora (P. infestans) |
Leaf spots, fruit rot, stem blight | – Resistant cultivars – Adequate canopy airflow, drip irrigation – Biological fungicides (e.g., Trichoderma spp.) |
| Weeds | • Pigweed, crabgrass, volunteer lettuce | Competition for nutrients, water, light | – Mulch, cover crops, mechanical cultivation – |