The increasing emergence of agricultural pests and phytopathogens poses a serious threat to global food security, crop productivity, and environmental sustainability. Rapid climate change, globalization, intensive agricultural practices, and excessive reliance on synthetic pesticides have contributed significantly to the evolution, spread, and resistance development of numerous insect pests, weeds, fungi, bacteria, viruses, and nematodes. Conventional pest control strategies based primarily on chemical pesticides are increasingly becoming ineffective due to pesticide resistance, environmental contamination, non-target toxicity, and adverse effects on human and ecosystem health. Consequently, integrated plant protection approaches have emerged as sustainable and environmentally compatible strategies for managing emerging agricultural pests and phytopathogens. This review critically examines the principles, components, and recent advancements in integrated plant protection systems, including cultural, biological, physical, mechanical, botanical, and chemical control measures. The article further highlights the role of host plant resistance, microbial biocontrol agents, precision agriculture, artificial intelligence, remote sensing, molecular diagnostics, and nanotechnology in enhancing pest surveillance and disease management. Additionally, the review discusses the ecological and economic benefits of integrated pest management (IPM) strategies, alongside the major constraints affecting their adoption in developing agricultural systems. The study emphasizes that integrated plant protection offers a holistic and sustainable pathway for reducing crop losses, minimizing pesticide dependency, preserving biodiversity, and improving agricultural resilience under changing climatic conditions.