AureoGold™, developed by Plant & Food Research in collaboration with Arysta LifeScience, is a natural yeast strain that reduces growth and spread of Psa bacteria. It can be used during flowering and post fruit set, a time in the calendar when use of other controls for Psa is limited. AureoGold™ is a yeast found naturally on many different species of plants and fruits in New Zealand and is safe for bees.