GB1287749A - Granular products for soil treatment - Google Patents

Abstract

1287749 Granular pesticides CIBA-GEIGY AG 5 Sept 1969 [6 Sept 1968] 44113/69 Heading A5E [Also in Division C1] A granular product for the treatment of soil comprises, per granule: (a) a solid nucleus which constitutes at least 65% by weight of the granule, this nucleus consisting essentially of: i) fertiliser; or ii) herbicide; or iii) a mixture of fertiliser and herbicide, and, optionally; iv) a solid additive chosen from insecticides, nematocides, fungicides and inert materials, at least 40% of the weight of the nucleus being soluble in water without decomposition, and (b) a coating which constitutes from 1% to 35% by weight of the granule, this coating covering the nucleus and consisting essentially of: α) particles of solid material; and #) a plasticised or non-plasticised solid polymeric resin which is insoluble in water and is present in amount sufficient to bond the particles of component (α) together and to the nucleus, wherein, in the coating: I) at least a portion of component (α), forming at least 40% of the weight of the coating, consists of material soluble in water, without decomposition, in an amount of at least I gram of material per 50 grams of water at 20‹C; II) at least 15% of the weight of component (α) is of active substance, different from that of the nucleus and chosen from fertilisers, herbicides, insecticides, nematocides, fungicides and substances capable of providing plants with trace elements; III) that the average value of the major diameters of the particles of component (α) does not exceed 0.2 mm; and IV) that the amount of component (#) does not exceed 10% of the weight of the coating. The nucleus may contain one or more of the following fertilisers: ammonium sulphate, ammonium chloride, ammonium nitrate, ammonium phosphates, sodium nitrate, potassium nitrate, calcium nitrate, potassium chloride, potassium sulphate, potassium carbonate, sodium phosphate, potassium phosphate, and urea; or may contain one or more herbicides, selected from derivatives of phenoxyacetic acid, phenoxypropionic acid, phenoxybutyric acid, 4-amino-3, 5, 6-trichloro-picolinic acid, sym. triazine, phenoxyethyl-sulphuric acid, halogen-. ated benzoic acid, halogenated acetic acid, halogenated propionic acid, phenylurea, or bipyridylium, and desirably containing a compound appearing in the following list of preferred herbicides:-sodium chlorate, sodium or potassium 2, 4-dichloro-phenoxyacetate, sodium or potassium 4-chloro-2-methyl-phenoxyacetate, sodium or potassium 2, 4, 5-trichloro-phenoxyacetate, sodium or potassium 2-(4-chloro-2- methyl-phenoxy)-propionate, sodium or potassium 2-(2, 4 - dichlorophenoxy) - propionate, sodium or potassium 2-(2, 4-dichlorophenoxy)- propionate, sodium or potassium 4-(2, 4-dichlorophenoxy)-butyrate, sodium or potassium 4- (4-chloro-2-methylphenoxy)-butyrate, sodium or potassium 4-(2, 4, 5-trichlorophenoxy)-butyrate, sodium or potassium 4-amino-3, 5, 6-trichloropicolinate, sodium 2-(2, 4-dichlorophenoxy)- ethyl-sulphate, 2, 3, 6-trichlorobenzoic acid, 3, 6-dichloro-2-methoxybenzoic acid, sodium chloracetate, trichloracetic acid, sodium 2, 2-dichloropropionate, sodium 2, 2, 3-trichloropropionate, N, N-dimethyl-N'-phenyl urea and its trichloracetic salt, the trichloracetate of N, N- dimethyl-N'-(4-chlorophenyl) urea, copper sulphate, iron sulphate, 1, 1'-dimethyl-4, 4'-bipyridylium dichloride, 1, 1'-bis-(3, 5-dimethyl- 4-morpholinyl)-carbonylmethyl-4, 4'-bipyridylium dichloride, 9, 10-dihydro-8a-10a-diazaphenanthrene dibromide, 3-amino-1, 2, 4-triazole, aldrin, dimethoate, vamidothion, and sym. triazines falling under the formula: in which X is chlorine, methoxy or methylthio, R 1 , R 2 , R 3 and R 4 are the same or different and are each hydrogen or an alkyl residue containing 1-5 carbon atoms in branched or straight chain and optionally bearing a methoxy group. Inert materials which can be incorporated in the nucleus are preferably dried clay, calcium carbonate, brick, pumice, pyrophyllite, sulphur, kaolin, dolomite, plaster, wood flour, sugars, sodium chloride or sodium sulphate. Component (b) α) may be or comprise a phenoxyacetic acid, phenoxypropionic acid, or 4-amino-3, 5, 6-trichloropicotinic acid derivative, or an s-triazine, 3-amino-1, 2, 4-triazole; talc, kaolin, calcium carbonate, magnesia, mica, titanium dioxide, zinc oxide, carbon black, sugars, starches, cereal flours, alkali or alkaline earth metal salts; or substances providing trace elements. Component (b) #) may be polyvinyl acetate or a vinyl chloride/vinyl acetate copolymer, but many other suitable resins are listed. The granule may if desired have two different coatings (b). Optional ingredients are plasticizers, waxes, U.V. absorbers and pigments.