IPM (Integrated Pest Management)

IPM (Integrated Pest Management) is the standard pest control philosophy in commercial cannabis cultivation, replacing the older "spray everything reactively" approach with a multi-layered preventive strategy that minimizes chemical use while maintaining clean grow environments. The IPM hierarchy of pest control: (1) Prevention (most important layer) — sanitation between cycles, quarantine of incoming plants, sealed grow rooms with positive-pressure HEPA-filtered air, foot baths and tool sanitation, climate control to maintain conditions unfavorable to pests; (2) Monitoring — yellow and blue sticky traps throughout grow space (yellow attracts whiteflies, fungus gnats, thrips; blue attracts thrips specifically), regular plant inspections with 10x loupe, scouting protocols where grow staff check designated plants daily; (3) Cultural controls — defoliation to expose pests and improve airflow, removing weakened plants that attract pests, optimizing plant spacing for inspection access; (4) Biological controls (preferred treatment layer) — beneficial predator releases including predatory mites (Phytoseiulus persimilis for spider mites, Amblyseius cucumeris for thrips), beneficial nematodes (Steinernema feltiae for fungus gnats and thrips pupae), parasitic wasps for whiteflies and aphids, predatory beetles for various soft-bodied insects; (5) Mechanical controls — physical removal of infested plant material, vacuum collection of pest populations, high-pressure water sprays; (6) Microbial inoculants — beneficial fungi and bacteria (Bacillus subtilis, Trichoderma harzianum) that compete with pathogens; (7) Selective chemical interventions (last resort) — organic pesticides only during vegetative stage (neem oil, insecticidal soap, spinosad, pyrethrins), never during flowering (residues persist on flower); avoid systemic synthetic pesticides entirely (myclobutanil "Eagle 20" caused multiple cannabis recall scandals). Weekly IPM protocol: Monday — rotate sticky traps and review previous week's catches for population trends; Tuesday — inspect designated plants throughout grow space with 10x loupe; Wednesday — apply preventive beneficial microbe sprays (compost teas, Bacillus inoculants); Thursday — release beneficial predators if monitoring shows early pest populations; Friday — clean and sanitize tools, replace foot bath solutions, document findings for trend analysis. Documentation is critical — IPM programs require records of pest populations, interventions, and outcomes to identify trends and refine protocols over time.