Sucking pests, primarily Whiteflies (Bemisia tabaci), Aphids, Thrips, and Spider Mites, pose a severe threat to greenhouse horticulture by depleting plant sap and transmitting phytoviruses. This article evaluates a comprehensive Integrated Pest Management (IPM) system designed to suppress these populations in controlled environments. Quantitative data from 2024–2025 indicates that uncontrolled infestations can reduce greenhouse yields by up to 60%. The study demonstrates that integrating 50-mesh physical barriers with biological agents, such as Encarsia formosa and predatory mites, achieves a pest mortality rate exceeding 92%. By prioritizing biological synergy over conventional sythetic pesticides, this management framework ensures high-quality, residue-free production and sustainable crop protection.