Plant derived essential oils as eco-friendly alternatives of synthetic pesticides

Essential oils are natural, aromatic compounds extracted from plants, known for their complex chemistry and powerful biological activity. Over the past few decades, they’ve emerged as promising candidates for eco-friendly pest control substances in agriculture. With proven effectiveness against a wide range of pests, including fungi, bacteria, insects, nematodes, and mites, essential oils offer a natural alternative to synthetic pesticides. Their strength lies in their diverse chemical makeup, particularly terpenes and related compounds, which can disrupt cell membranes and vital processes in plant pathogens. However, despite encouraging research, only a few EO-based products have reached the market. Challenges such as inconsistent chemical profiles, limited biomass availability, formulation issues, and regulatory barriers continue to hinder their wider use. Still, there is growing interest in overcoming these obstacles through cultivation strategies, improved extraction methods, and advanced formulations that enhance stability and efficacy. Recent studies also show that EOs can act as elicitors, enhancing the natural defenses in plants. The paper discusses the latest scientific literature on the biological activities of EOs from medicinal plants against plant pathogens, pests, and weeds, their chemical composition, and modes of action. Additionally, the review explains both the benefits and limitations of using EOs as alternatives to synthetic pesticides, as well as the regulatory and approval processes involved. Keywords: biopesticides, secondary metabolites, aromatic compounds, terpenes, phenylpropanoids