Evaluation of antifungal activity of some plant essential oils against tomato grey mould disease

Evaluation of Copper-Free Alternatives to Control Grey Mould in Organic Mediterranean Greenhouse Tomato Production

“…The first one is a product that has been registered and authorised as a fungicide for many horticultural crops to control powdery mildews. In this regard, our results are consistent with the results reported in several studies previously reporting the antifungal properties of potassium bicarbonate [37][38][39] and cinnamon [40][41][42][43][44] when tested in vitro against B. cinerea. In the case of cinnamon, not only has fungicidal activity been reported, but bactericidal, insecticidal, and nematocidal activities have been reported, as well [45].…”

“…Additionally, similar observations were made by Sernaite et al [43], who obtained excellent B. cinerea inhibition results in in vitro tests but obtained zero inhibition when applying the same extract (12 mL/L dosage, i.e., 10 times more concentrated than the minimal fungicidal concentration found in their in vitro tests) to detached strawberry leaves that were previously infested with the fungus. Likewise, a recent article by Ebrahimi et al [41] reported that cinnamon oil applied at three different concentrations inhibited the growth of B. cinerea through in vitro assays, as well as the development of grey mould on the tomato plants under greenhouse conditions, resulting in higher height, as well as higher fresh and dry weights of the plants when compared to untreated plants. However, in contrast to our study, Ebrahimi et al's [41] trials were performed with tomato seedlings grown in plastic pots (five repetitions, two plants each) covered with a plastic bag after being sprayed with cinnamon oil, and measurements were performed two weeks after the artificial inoculation of the pathogen.…”

“…Likewise, a recent article by Ebrahimi et al [41] reported that cinnamon oil applied at three different concentrations inhibited the growth of B. cinerea through in vitro assays, as well as the development of grey mould on the tomato plants under greenhouse conditions, resulting in higher height, as well as higher fresh and dry weights of the plants when compared to untreated plants. However, in contrast to our study, Ebrahimi et al's [41] trials were performed with tomato seedlings grown in plastic pots (five repetitions, two plants each) covered with a plastic bag after being sprayed with cinnamon oil, and measurements were performed two weeks after the artificial inoculation of the pathogen. In our study, plants were grown directly in soil under on-farm greenhouse crop conditions for 6-7 months.…”

Antifungal Mechanism of Cinnamon Essential Oil against Chinese Yam-Derived Aspergillus niger

“…Yam pieces were put into boxes (42 cm × 20 cm × 23:5 cm) made of corrugated paper, and 50 mL of 0MIC, 1/2MIC, 1MIC, 2MIC, or 3MIC cinnamon essential oil was sprayed inside the boxes. The cut surface of the Chinese yam pieces in the control group was not infected with the fungal solution and was directly put into a corrugated paper box [13]. Six test groups were set up for the shelf life test of Chinese yam, and 3 repeats were set up in each group.…”