Harpin Proteins are produced in nature by many plant pathogens.
Many of the plants that those pathogens attack have developed receptors on their seeds, roots, and foliage to detect the presence of Harpin Proteins. This “early warning system” triggers signals throughout the plants to activate certain defensive and growth responses. These vigorous responses to the threat of disease help the plants survive the stresses and other threats the diseases present.
The Harpin Protein response among plants is so prevalent and extensive that the resulting beneficial activity has been documented across a broad spectrum of crops including Field Crops, Vegetables, Tree Fruit and Vines, Turf and Ornamental and Specialty Crops.
Each of these products has been reviewed and registered with the US-EPA, and Plant Health Care, Inc. is the sole provider of commercial Harpin technology in the world. See Harpin αβ fact sheet.