Assessing the Ecological and Health Consequences of Pesticide Applications in Horticultural Production Systems: A Review

Abstract

The intensification of horticultural practices over the past several decades has been accompanied by increased reliance on synthetic pesticides to control pests, diseases, and weeds that threaten crop productivity and quality. Pesticides play a crucial role in maintaining horticultural crop yields and quality, yet their widespread application poses significant environmental and health challenges. This review provides a comprehensive analysis of pesticide impacts in horticultural systems, examining contamination pathways, ecological consequences, and human health implications. Evidence from recent studies indicates that over 79.9% of horticultural crops contain detectable pesticide residues, with 32.9% of samples exceeding Maximum Residue Limits (MRLs). Environmental contamination is pervasive, with 95% detection rates in agricultural soils and 89% in surface waters. Health impacts range from acute poisoning symptoms to chronic diseases, including cancer, neurological disorders, and reproductive dysfunction. Organophosphates demonstrate the highest cancer risks, with acute myeloid leukaemia showing a 1.8-fold increased risk among agricultural workers. Neonicotinoids pose severe threats to pollinators, with colony losses exceeding 30% in affected regions. Mitigation strategies, including Integrated Pest Management (IPM), organic farming, and biological control, show promise, achieving 25-95% reductions in pesticide use and 40-85% reductions in environmental impacts. Bioremediation technologies offer cost-effective solutions for contaminated site cleanup, with bioaugmentation achieving complete pesticide removal within 35 days. Future regulatory frameworks must balance food security needs with environmental protection and public health considerations through evidence-based policies and sustainable agricultural practices.