Abstract
For many years, plant protection products have been used to manage plant diseases in agriculture, contributing to increase agricultural production. However, plant protection products could cause undesirable adverse effects on human health and the environment. This research aims to highlight the efficacy of plant protection strategies based on natural products. In order to find an alternative to the use of synthetic fungicides, different formulates based on essential oils, single and in combination, have been tested against zucchini powdery mildew. Their effectiveness against fungal pathogens has been studied extensively, showing that their antifungal activity is closely associated with monoterpenic phenols, i.e. thymol, carvacrol, eugenol. The tested essential oils included Rosmarinus officinalis (L.), Syzygium aromaticum (L.) Merr. & L.M. Perry and Origanum vulgare (L.). The performed experiments pointed out that when using the combination of essential oils, the formulate showed better disease protection compared to the ones based on single oils, confirming the results obtained in previous trials. The good level of disease reduction, also observed in these trials, allows us to carry on the work for the development of formulations based on essential oils at low dosages, taking advantage of the essential oils mixtures’ synergistic effect.
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