A truly systemic fungicide for the control of downy mildew on onions, for the control of late blight in potatoes (in combination with Mancozeb), downy mildew in brassica seed beds and phytophora spear rot in asparagus. AGPRO Helios can be used in tree nurseries for the control of phytophthora root rot and for the prevention and control of pythium in all playing surfaces. Metalaxyl is translocated in an upward and outward direction to kill susceptible diseases from within the plant.