An adjuvant composition is provided which comprises:(a) at least one water-soluble electrolyte；(b) at least one electrolyte-tolerant surfactant；(c) antifoam component which is at least one mixture selected from the group consisting of (1) at least one branched silicone resin (i), at least one silicone fluid (ii), at least one particulate metal oxide (iii) and, optionally, at least one catalyst (iv) for catalyzing the condensation of siloxy groups, (2) the equilibration reaction product of mixture (1), and (3) mixture (1) in which at least a portion of particulate metal oxide (iii) is pre-hydrophobized；(d) optionally, at least one additional bioinert material； and,(e) water.
