An agricultural oil-based suspension formulation comprising an active ingredient suspended in finely divided form in an oil； and at least one surfactant selected from a polyalkylene glycol-fatty acid condensate or a polyalkylene glycolether fatty acid condensate formed from a reaction between a compound having Structure (1) and a compound having Structure (2): wherein R1=H or a C1-C30 alkyl radical； A and B are ethylene or propylene groups in succession or random； n=0 or >；1； and m=0 or >；1, and wherein n+m>；34； R2=C8-C30 alkyl or alkylene radical (branched or linear)； and x=>；1.
