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.

多年来，植物保护产品已被用于管理农业中的植物病害，从而促进了农业生产。但是，植物保护产品可能会对人体健康和环境造成不良影响。这项研究旨在强调基于天然产物的植物保护策略的有效性。为了找到替代使用合成杀真菌剂的方法，已经对基于西葫芦白粉病的基于单方和复方精油的不同配方进行了测试。他们对真菌病原体的有效性已被广泛研究，表明它们的抗真菌活性与单萜酚（百里酚，香芹酚，丁子香酚）紧密相关。经测试的香精油包括迷迭香（L.marinus officinalis）蒲桃（Syzygium aromaum）（L.）Merr。＆LM Perry和牛至（L.）。进行的实验指出，当使用精油组合时，与基于单一精油的配方相比，该配方显示出更好的疾病防护效果，从而证实了先前试验中获得的结果。在这些试验中也观察到了良好的减少疾病水平，这使我们能够继续利用低剂量精油混合物的协同效应来开发基于低剂量精油的制剂。