I am planning some experiments to shed light on the molecular mode of action of biostimulants on grapevine (vitis vinifera) and would like some community advice. The idea is to use 4 different treatments (at least one microbial) but given the wide variety of products available on the market it is diffilcult to proceed with one or another.
I would like to know if anybody has experience on grapevine biostimulation or has any reference for the best european biostimulants company.
Moreover, I am also concerned whether to use "pure biostimulants" (that is to say, humic acids, algal extracts, etc) or "enriched biostimulants" which are the pure ones but supplemented with some nutrients. A pure product may be the best choice because the effect will be exclusively attributted to the main product and no to the supplemented nutrients.
Thanks in advance