This proves that the encapsulation had significant effects on the half-life of the essential oils and could protect it against the environmental conditions and mainly evaporation. Moreover, the concurrent use of essential oils and nanogel could have resulted in controlled release of the investigated essential oils from nanogel during the experimental period which this in turn enhanced the antifungal effects of the oils. On the other hand, the results of the in vivo application of the CS-BA nanogel-encapsulated oils on tomato samples within one month were found promising as full preservation of the samples at concentrations above 700 mg/l was achieved