The invention provides a liquid pesticidal formulation which comprises at least one pesticidal compound, one or more pesticidally acceptable carriers and as a crystallisation inhibitor (a)a polyhyroxylated aromatic compound, (b)a monohydroxylated aromatic compound, in which the aromatic ring is substituted by halo, alkoxy, nitro, carboxy, cyano or by optionally substituted phenyl in a position ortho to the hydroxy, (c)an amino substituted aromatic compound, or (d)an aliphatic carboxylic acid of chain lenght 1 to 8 carbon atoms, comprising one to three carboxy groups, and optionally substituted by hydroxy.
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