In vivo evaluation of liquid polyphenols obtained from OMWW as natural bio-chemicals against several fungal pathogens on tomato plants

Olive mill wastewater (OMWW) is the result of the production of olive oil causing severe water pollution. In recent years, distinguished growing interest in isolation, testing, and utilization of agricultural waste or other sources of plant tissues rich in polyphenols has been arised. In this study, the evaluation of liquid polyphenols obtained from OMWW as natural bio-chemicals against several fungal pathogens on tomato plants was examined. Different concentrations of liquid formed polyphenol (LFP) at 5, 10, 20, and 30% were tested against 10 fungal pathogens causing plant diseases on tomato plants. After 40d of application, tomato plants were harvested and plant height, number of flowers, plant fresh weight, root fresh weight, dry plant weight and dry root weight were calculated and LFP has presented encouraging results in protecting plants. Furthermore, the encapsulation of a polyphenol in encapsulating agent may help to slow down the degradation and protection from the frequent watering and runoff due to this action. Therefore, in order of major protection resulting from the use of polyphenol against major diseases classified the following phytopathogenic fungi: Botrytis cinerea, Sclerotinia sclerotiorum, and Ascochyta lentis.