Halo (Harpin) heralds a new technology in plant stimulants and health. Using the Harpin Alpha Beta protein, a powerful new plant technology. HALO is foliar applied, on application a message or signal is sent throughout the plant, initiating a sequence of physiological and biochemical reactions that activate plant growth and stress-defence pathways. The result is a healthier, more productive crop. Best effects are obtrained when the product is applied to physiologically active plants, such as flower induction, fruit set, fruit enlargement and pre-harvest.