Laboratory trials conducted with QuestPharma in Spain. Different acid formulations were tested on Salmonella Choleraesuis and Fusarium Verticiloides. Clear benefits with SoftAcid were observed.
The figures below shows the results of minimum inhibitory concentration (MIC) tests with different acidifiers.
Figure 1: MIC for different acidifiers vs Salmonella
- SoftAcid V is far more efficient than ammonium formate.
Figure 2: MIC for different acidifiers vs Fusarium
- SoftAcid P+ is very efficient on fusarium even at low inclusion rate (0.5 kg/t).
- Propionic acid is less efficient than SoftAcid P+ in inhibiting fusarium (1 kg/t to achieve the same effect).
- Ammonium propionate requires an even higher dose than propionic acid to achieve the same results (2.5 kg/t).
Propionic acid has its strongest antifungal activity in the range between pH 4.5 to 5.0. As a result, pH in the sample treated with pure propionic acid is too low, and a higher MIC can be observed. Similarly, the pH in the sample treated with propionate is too high, resulting in the same drop in efficiency.