TECHNOLOGY FOCUS - AGRICULTURE - Preferred Components: The acidic aqueous pesticide composition further comprises: an ACS solution present at below 20 wt./vol.% of the aqueous pesticide composition; a sulfuric acid solution present at below 10 wt./vol.% of the aqueous pesticide composition; and a surfactant for the surface area of the aqueous pesticide composition on the soft bodied animal of interest, where the surfactant is an ionic-, anionic- and/or zwitterionic-surfactant. The organic acid is present at 5-15, preferably 12 wt./vol.%, ACS solution is present at below 20 wt./vol.%; sulfuric acid solution is present at 0, preferably below 0 wt./vol.%, the acidic aqueous pesticide composition has a pH of 0.8-2.5, preferably 1.5, and the soft-bodied animal is coqui frog or coqui frog egg. The organic acid is present at 5-15, preferably 12 wt./vol.%, ACS solution is present at 0 wt./vol.%; sulfuric acid solution is present at below 10 wt./vol.%, the acidic aqueous pesticide composition has a pH of 0.8-2.5, preferably 1.5, and the soft-bodied animal is a mature coqui frog, coqui frog egg or a juvenile coqui frog. Preferred Method: The method of killing a soft-bodied animal of interest with an acidic aqueous pesticide composition further comprises: spraying the acidic aqueous pesticide composition in the area inhabited by the soft bodied animals of interest, where spraying the acidic aqueous pesticide composition occurs prior to the step of contacting the soft bodied animal of interest; waiting for a period of time (2-10 days); repeating the step of locating the soft bodied animals until the area inhabited by the soft-bodied animals has a significantly reduced number of soft-bodied animals of interest; placing a lure in the area inhabited by the soft bodied animals of interest, prior to the step of spraying the acidic aqueous pesticide, and the lure remains in the area indefinitely; checking the lure after the period of time; and discarding any coqui frogs or coqui frog eggs found in the lure. In the method, means for spraying the acidic aqueous pesticide composition in the area inhabited by the soft bodied animals of interest is a hand sprayer, a garden sprayer with volumes less than 10 l, mounted sprayer-semi hydraulic, trailed sprayer, mounted sprayer with hydraulic boom, trailed sprayer with high wheel, trailed sprayer high wheel with electronic control unit, mounted sprayer-basic type, mounted sprayer-basic type with clean water tank, garden sprayer, high pressure diaphragm pump, power sprayer with electric or fuel powered engine, fertilizer spreader, inter-row rotary cultivator or their functional equivalents. ACTIVITY - Insecticide.    MECHANISM OF ACTION - None given.    EXAMPLE - Propionic acid (5-15 ml) was added to water (100 ml) and mixed to give an acidic aqueous pesticide composition. Sulfuric acid was added to adjust the pH (2-2.5) of the composition.