Potato Review Group

Definitions of biologicals, biostimulants and microbes


Biological products are those with the basis of a living entity, e.g. bacteria or fungi.



“Plant biostimulants contain substance(s) and / or microorganisms whose function when applied to plants or the rhizosphere is to stimulate natural processes to enhance / benefit nutrient uptake, nutrient efficiency, tolerance to abiotic stress, and crop quality.” (European Biostimulants Industry Council, EBIC)



Microbes are micro-organisms including:

  • bacteria
  • fungi
  • algae
  • protozoa
  • viruses


More details are given on the individual pages.

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