The present invention relates in a first aspect to the use of monosaccharides and/or disaccharides for the stimulation of mycorrhization in plants as well as of the production of mycorrhizal inoculum. In addition, the present invention relates to the use of monosaccharides and/or disaccharides, optionally, in combination with mycorrhizal inoculum for increasing the germination rates of plants or for yield of the plants. In addition, methods for the production of mycorrhizal inoculum as well as for the treatment of plants, in particular crops, is provided. Finally, the present invention relates to a kit or composition for stimulation of plant mycorrhization, for the production of mycorrhizal inoculum, for increasing the germination rate of plants and/or yield of the plants containing monosaccharides and/or disaccharides as well as mycorrhizal inoculum.
