Lyon, 1st July 2019 – AMOÉBA announces that Willaertia magna C2c Maky effectively treats rust, a group of diseases that decimates field crops, such as soybean and wheat. The study, undertaken by an independent expert, demonstrated more than 85% efficacy when lysed W. magna was applied according to a standard protocol. Following on from the excellent results obtained with W. magna used as a treatment for downy mildew of grapevine and late blight of potato, its action on Uromyces fabae fungi confirms that the amoeba is a potential biocontrol agent with a broad spectrum of action.