Phytoncide

Phytoncides are a biologically active substance of plant origin that kills or inhibits growth and development of bacteria, microscopic fungi, and protozoa.

[3] Because of the antimicrobial properties of phytoncides, research has been done to investigate their potential use in medicine,[4][5][6][7] as a plant protector in greenhouses, and in the shipping and storing of perishables such as fruits and vegetables.

One volatile phytoncide, sophoraflavanone G, is of particular interest due to its potential for use against methicillin-resistant Staphylococcus aureus[8] (MRSA) and vancomycin-resistant Enterococcus bacteria.

Cedar, garlic,[9] locust, oak, onion, pine, tea tree, many spices, and many other plants give off phytoncides.

Sophora flavescens contains sophoraflavanone G. More than 5,000 volatile substances defend plants that protect them from bacteria, fungi, and insects.