The present invention relates to use of vegetable oils such as
soybean oil as an
adjuvant for substances having a
fungicide, bactericide and insecticide activity in preventive or curative treatments of
plant diseases caused by fungi,
bacteria and insects on agricultural cultivations. In addition, the present invention relates to use of vegetable oils such as
soybean oil as an
adjuvant for substances having a herbicide activity in treatments for
weed control on agricultural cultivations. Finally, the present invention relates to a
fungicide, bactericide, insecticide or herbicide composition characterized in that it comprises: a stable water
emulsion of vegetable oils such as
soybean oil; and at least one substance having a
fungicide, bactericide, insecticide or herbicide activity.