PURPOSE: To obtain the above composition useful for the control of termite by the forming application, capable of producing a stable stock solution of a one-pack foamable termite-controlling agent free from the problems such as precipitation and clouding even by adding water to the stock solution, by using a foaming agent and a specific nonionic surfactant as essential components.

CONSTITUTION: The objective composition contains (A) a foamable surfactant consisting of a higher alcohol sulfuric acid ester salt such as sodium laurylsulfate containing or compounded with water as a foaming agent, preferably containing 1W20wt.% of water and (B) a nonionic surfactant of formula ( is alkylphenyl or arylphenyl; n is 8W12) such as polyoxyethylene styrylphenyl ether. In addition to the above two kinds of surfactants, the present composition is uniformly mixed and dispersed with an active termite-controlling component (e.g., chlorpyrifos), a solvent, a dissolution assistant, a foaming assistant, water, etc. It is properly diluted with water in use. The problems of speciality, high cost and fire hazard are eliminated and the composition has high versatility, cost merit and safety.