Provided is an insect pest control product which is applicable to a water-based insecticidal composition and can exert stable performance over a long period of time. The insect pest control product comprises a thermal vaporization/diffusion absorbent wick for vaporizing and diffusing a water-based insecticidal composition containing a pyrethroid insecticidal component having a vapor pressure of 2 × 10 -4 to 1 × 10 -2 mmHg at 30°C, a glycol ether compound having a boiling point of 150-300°C, and water. The thermal vaporization/diffusion absorbent wick has a water/oil-based liquid absorption ratio (V 1 /V 2 ) within the range of 0.55-1.0, where the water/oil-based liquid absorption ratio (V 1 /V 2 ) is calculated from a speed (V 1 ) at which a water-based liquid formulation rises through the thermal vaporization/diffusion absorbent wick when a lower portion of the thermal vaporization/diffusion absorbent wick is immersed in the water-based liquid formulation, and a speed (V 2 ) at which an oil-based liquid formulation rises through the thermal vaporization/diffusion absorbent wick when a lower portion of the thermal vaporization/diffusion absorbent wick is immersed in the oil-based liquid formulation, where the water-based liquid formulation is an aqueous solution containing 40 mass% of diethylene glycol monobutyl ether, and the oil-based liquid formulation is a fluid paraffin having 14 carbon atoms.提供一種可適用於可長時間持續發揮穩定的性能之水性殺蟲劑組成物之害蟲防除製品。一種害蟲防除製品，包含用以使含有如下的成分之水性殺蟲劑組成物蒸散的加熱蒸散用吸液芯：30℃下的蒸氣壓為2×10-4~1×10-2mmHg之擬除蟲菊酯系殺蟲成分，與沸點為150~300℃之乙二醇醚系化合物，與水，在分別將加熱蒸散用吸液芯的下部浸漬於由二乙二醇單丁醚40質量%水溶液構成的水性處方液或由碳數14的流動石蠟構成的油性處方液的情形下，水性處方液在加熱蒸散用吸液芯上升的速度(V1)，油性處方液在加熱蒸散用吸液芯上升的速度(V2)，加熱蒸散用吸液芯的水性/油性吸液比率(V1/V2)為0.55~1.0的範圍。
