METHOD FOR DWARFING THE STEM OF SUNFLOWERS AND COTTON

摘要

The stems of sunflowers are dwarfed and stiffened by application, to the plants or the soil in which they are seeded, of a pyrazolium salt of formula (I) or (II) (where R1 and R2 are 1-3C alkyl, or phenyl; R4 is H, OH, 1-18C alkyl, 1-3C haloalkyl, 1-4C alkoxy, 2-4C alkenyl, haloalkenyl or alkynyl, benzyl, cyclohexylmethyl, COOCH3, -CH2COOC2H5, -OP(O)(OC2H5), halo, nitro, or where R7 and R8 is H, halogen or NO2; R3 and R5 is 1-12C alkyl, 1-6C alkoxy, 3-6C cycloalkyl, 3-6C cycloalkylthio, halo, NH2, (CH3)2N-, C6H5NH-, C6H5O-, C6H5S-, U,V and W is H, halogen, 1-4C alkyl, 1-3C alkoxy, CN,NO2.CF3,CH3S-, CH3SO2-, CH3CONH- CH3OOC,C6H5 or C6H5O-; R6 is (H)n or (CH3)n; n is 0 or 1, m is 1,2 or 3; X is acetate, sulphate, hydroxide, hydrogen sulphate, methylsulphate, benzene sulphonate, 1-4C alkyl benzene sulphonate, 1-4C alkoxy benzene sulphonate, nitrate, phosphate, hydrogen phosphate, dihydrogen phosphate, carbonate, 1-12C alkane sulphonate, bromide, chloride or iodide.