Liquid analogs of certain polyoxyalkylene compounds having a plurality of heteric polyoxypropylene/polyoxyethylene chains as dispersants for pesticidal formulations

A stable, aqueous pesticide dispersion composition comprising: (a) a water insoluble pesticide; (b) a polyoxyalkylene copolymer having surface active properties, said copolymer having the formula Y[(EO,PO)m(PO)n(EO,PO)m, H]x wherein Y is the nucleus of an organic reactive hydrogen compound having x reactive hydrogen atoms and up to 6 carbon atoms, x is an integer, EO is ethylene oxide, PO is a propylene oxide hydrophobe having an oxygen/carbon ratio of not more than 0.40, (EO,PO) represents a hydrophilic heteric block having an oxygen/carbon ratio of more than 0.40, m, m' and n are numbers such that the total molecular weight of said hydrophilic heteric block is from about 660 to 4,400, the total molecular weight of said PO hydrophobe is from about 1600 to 3600 and the total molecular weight of said copolymer ranges from about 2200 to 8000, said copolymer being about 30 to 55 weight percent hydrophilic with said hydrophilic heteric block comprising from about 5 to 40 weight percent of PO; and (c) water.