Disclosed are suspension concentrate compositions comprising by weight based on the total weight of the composition, about 0.1 to about 40% of at least one carboxamide arthropodicide； 0 to about 20% of at least one other biologically active agent； about 30 to about 95% of at least one water-immiscible liquid carrier； about 2 to about 50% of at least one emulsifier； about 0.01 to about 10% of a silica thickener； about 0.1 to about 10% of at least one protic solvent selected from water, a C1-C12 alkanol and a C2-C3 glycol； and about 0.001 to about 5% of at least one water-soluble carboxylic acid. A method for controlling an arthropod pest comprising diluting said suspension concentrate composition with water, and optionally adding an adjuvant to form a diluted composition, and contacting the arthropod pest or its environment with an effective amount of said diluted composition is also disclosed.
