I: TLS aqueous solution (1500 ppm).
II: TLS formulation aqueous solution: (1500 ppm of TLS + 2500 ppm of acetic acid + 2500 ppm of gluconic acid + 500 ppm of sodium acetate).
III: organic acid aqueous solution (2500 ppm of acetic acid + 2500 ppm of gluconic acid + 500 ppm of sodium acetate).
Symbols: +, Large inhibition zone diameter (>10 mm); (+), small inhibition zone diameter (1–10 mm); , no inhibition zone.