Hello, the onion juice, leaves extract or chrystals of mint, the peel extract of pomegranate, the essential oil ob basil, etc very effective against P.aeruginosa.
We found that natural extract that contains oleanolic acid can be very effective at disrupting P.aeruginosa biofilms (see doi: 10.3390/antibiotics9120911 )
You can read this article for more information. We used 11 different antibiotics to estimate the susceptibility of Pseudomonas aeruginosa biofilms in the indoor and outdoor environment.
Article BIOFILM FORMATION AND ANTIMICROBIAL SUSCEPTIBILITY OF PSEUDO...