Fecha de publicación: 05/01/2023 Fuente: Wipo Milk or dairy products The invention concerns the use of alginate oligomers in sequence α(1-4)Guluronane and/or β(1-4)Mannuronane having a DP greater than 30, as an active ingredient of biocontrol products in plants, and that may be combined with another molecules such as phytohormones, against cryptogamic diseases of plants, in particular of vine (Vitis vinifera), or to protect other species against aggressors such as pathogenic microbes or insects.