The present invention relates to a method for the treatment of crops, comprising the steps of 1) preparation of a spraying solution by mixing of 1.1) at least one agrochemical composition, and 1.2) raw glycerol derived from the production of biodiesel； and 2) application of said spraying solution on the soil and/or crop and/or weeds and/or pests and/or their locality and/or habitat. Further on, it relates to the use of raw glycerol derived from the production of biodiesel in the preparation of a spraying solution which comprises at least one agrochemical composition. Additionally, a spraying solution is disclosed comprising water, raw glycerol derived from the production of biodiesel and an agrochemical composition.
