The general formula compound ro - (C2H4O) n (C3H6O) Mr ',Ro represents the alcohol component selected from saturated or unsaturated, unsaturated or unsaturated monoalcohol, single chain or branch, C1-6 or 2 to 12 C atoms and 2 to 6 hydroxy groups of polymer, R 'represents a hydrogen atom and / or a Co-r group. R '' represents other saturated or unsaturated asphalts, straight lines or chains, and c5-29,M numbers 1 to 10 to N equal zero, or 1 to 40, and / or non-toxic complexes as additives for phytosanitary products containing biomaterials. The use of these additives is advantageous because they show very small or non phytotoxic properties, high tolerance to all types of microorganisms, no toxicity to humans, no skin or eye irritation, protection of useful organisms, and good fuming properties. Adhesion on plants
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