Nutri-Aktiv Fitoxi Zn-B is a PK potassium phosphite, 30% p / v Water soluble phosphoric anhydride (P2O5) and 40% p / v water soluble potassium oxide (K2O). The phosphite ion induces the synthesis of phytoalexins, which gives the plant greater resistance to possible diseases caused by fungi and a systemic nutritional contribution. Nutri-Aktiv Fitoxi Zn-B is enriched with zinc and boron, providing the necessary nutrients when plants are in maximum need of nutrients.