| abstract |
Plant-compatible copper ammine salts (I) of organic monocarboxylic (at least 4C), dicarboxylic or polycarboxylic acids are new. Pref. acids are 4-20, esp. 5-12C fatty acids; dicarboxylic acids with up to 12, esp. 6C; and polymeric acids, particularly poly(acrylic or methacrylic) acids. The polymeric acids may also contain corresp. ester residues, e.g. they comprise 60-100% acrylic and/or methacrylic acids, plus up to 40% corresp. esters. Also claimed are aq. solns. of (I). (I) are esp. useful as fungicides and are applied to the plants as an aq. soln. which dries to give a coating of metal poly-salt which is insoluble or only sparingly soluble in water (and therefore having a long-lasting effect). They are esp. useful against Phytophthora infestans, Plasmopara viticola, Pseudoperonospora humuli, Cercospora beticola, C.musae, Venturia inequalis, Exobasidium vexans and Hemileia vastatrix. (I) also have excellent activity against phytopathogenic bacteria (e.g. Erwinia amylovora on pear trees) and can be used to inhibit algae, moulds, moss, lichen, on plants, stone structures, plaster, paint, wood, etc. |