It can be observed from the graph a greater absorption of green light by the leaves of the vines treated with ZEI™ compared to the leaves of the vines treated with conventional products. This result was obtained by taking the leaves subjected to various treatments from the 6th internode and subjecting them to morpho-colourimetric analysis, in order to detect the degrees of green and red. The greater absorption of green light translates into a higher chlorophyll content in the leaves treated with ZEI™ and therefore into a greater photosynthetic activity of the plant with a consequent better accumulation of photosynthetic compounds. With a single treatment, we can therefore defend and at the same time nourish the vine.