Abstract: The present invention relates to improved biocide compositions based on calcium fluoride which are suitable for a broad range of applications including surface disinfectants, additives to construction materials and paints, antiseptic medical and cosmetic formulations, as a crop protection product and as a fast-acting disinfectant. The biocide composition of the invention comprise at least the following components: a) calcium fluoride b) a salicylic acid ester c) at least one organic acid selected from the group comprising or consisting of cinnamic acid, rosmarinic acid, vanillic acid, ascorbic acid, abscisic acid, mandelic acid, mevalonic acid, aspartic acid, salicylic acid, fumaric acid, isocitric acid, gallic acid, quinic acid, boswellic acid, carnosic acid, chlorogene acid, caffeic acid, other hydroxycarboxylic acids, or a salt or ester thereof, or thymol or citronellal. d) a cationic polymer and/or natural sea salt or a synthetic equivalent thereof and/or a cationic tenside, e) water.

Abstract: The invention relates to a plant protecting composition or agricultural pesticide, comprising a substance which is selected from the group comprising poly(alkyl)guanidines, poly(alkyl)biguanidines, polyguanines or octenidin, or any blends of substances of this group. In a preferred embodiment, the substance which is selected from the group comprising poly(alkyl)guanidines, poly(alkyl)—biguanidines, polyguanines or octenidin, or any blends of substances of this group, is present in combination with at least one other component exhibiting activity against agricultural pests. Said least one other component exhibiting activity against agricultural pests may represent at least one active agent of a commercially known pesticide. A further aspect of the invention relates to a method for protecting plants against plant pathogens comprising the application of the above agricultural pesticide compositions.