HALO Technical Data
The active ingredient in HALO is Harpin Alpha Beta, a naturally occurring protein that activates the plant’s natural defence system. This is not to be confused with Harpin EA which is used in a well known product in the USA. Harpin EA is the first generation science with only a single receptor. HALO Harpin Alpha Beta is the latest generation of the Harpin protein with 4 active sites. The increase in both number and nature of these active sites upon the protein, enable lower dose rates and a wider efficacy with a more positive effect on the crop.
The major component of HALO is the active ingredient - Harpin Alpha Beta (αβ). A bacterial protein that activates the plant’s natural defence system. This unique protein activates plant reactions after binding to the plant’s early warning receptors telling the plant it is under attack. These receptors respond by sending a message throughout the plant, initiating a sequence of physiological and biochemical reactions.
The resulting reactions activate both growth and stress-defence pathways within the plant, resulting in healthier and more productive crops.
The Harpin αβ protein in HALO evolved from the original native Harpin EA protein initially isolated from Erwinia Amylovora, the bacterium that causes fire blight in apples and other rosaceous plants. Harpin αβ is an acidic, heat-stable, glycine-rich, extracellular protein. The protein consists of 403 amino acids with no cysteine.
Harpin EA, the original formulation, has just one active site on the protein that elicits a plant response. Halo’s Harpin αβ is the second generation of this technology and has 4 active regions on the protein. The increase in both number and nature of these active sites enable a lower dose rate, wider efficacy, more stable and positive effect on the crop.