P. fluorescens is well known for some of its more heroic properties. Firstly it is invaluable to agricultural technologies. These bacteria will reside around the roots of plants/crops. They get certain nutrients and environmental protection from the plants they reside near and in return, aid the plant in several ways. They destroy certain toxins and pollutants including styrene, polycyclic aromatic hydrocarbons, and TNT. They also protect the plants from infection by pathogens by producing secondary metabolites like antibiotics and hydrogen cyanide which kill other bacteria and fungi. They also keep other pathogens at bay by competitive exclusion due to their rapid colonization. It has been theorized that P. fluorescens could be a good alternative to synthetic pesticides because of its toxicity to larvae and the pupae of vector mosquitoes, two main concerns in the agricultural business. Furthermore, these microbes produce substances that aid in the plants ability to obtain key nutrients.