Phytosanitary treatment of plants by a zinc-chelate soluble copper released gradually in situ from a source of copper, and a zinc-chelate zinc-chelate and compositions which can be used for this purpose

摘要

To increase the efficiency of a cupric phytosanitary composition and therefore reduce the dose of copper used per hectare, there is associated with a source of copper in the form of a non chelated a chelate poorly soluble calcium and / or of zinc and / or manganese. This combination makes it possible to obtain, in situ, the gradual release of a chelate of soluble copper.