Abstract: An aqueous pesticidal composition is provided which includes a pesticidally active ingredient in admixture with a polyacrylamide supersorbent material, which may be cross-linked. The pesticidally active ingredient, which may be virtually any commonly used insecticide, herbicide, or fungicide, may be present in the formulation at or below the recommended dosage of the pesticide if used alone. The supersorbent material is present at a concentration in the range of about 0.01 to 0.5 parts by weight per part by weight of formulation. The pesticidal composition of this invention displays synergistic characteristics as the supersorbent, which has no independent pesticidal properties, greatly improves the pesticidal effectiveness of the active pesticidal ingredient with which it is used.