| abstract |
New fungicides contain aqueous solutions of (a) a copper ammine salt and (b) the ammonium salt of a polymer consisting of 60-100% acrylic acid or methacrylic acid and 0-40% acrylic or methacrylic acid ester. The fungicides pref. contain 0.01-10% Cu, pref. in the form of the ammine complex. The polymer is in the form of its water-soluble ammonium salt and may be produced by usual polymerisation procedures. Fungicidal agents for use in plant protection (esp. against Phytophthora infestans on tomatoes and potatoes, Plasmopara viticola on vines, Pseudoperonospora humid on hops, Cercospora beticola on beet, Cercospora musae on bananas, Venturia inaequalis on apples, Exobasidium vexans on tea, and Hemileia vastatrix on coffee), in antifouling paints, and wherever undesirable growth by organisms is to be prevented. When the agents are applied, drying out of the solution leads to reaction between the polyanion of the polymer and the copper ammine complex to form a crosslinked water-insoluble metal poly-salt which shows good adhesion and retains its fungicidal effect for a prolonged period. The fungicidal activity is greater than that of known copper fungicides. |