In Vitro</span></i><span lang="EN-GB" style="font-size: 12.0pt; font-family: Times New Roman"> and <i>in Planta</i> Activity of Some Essential Oils&nbsp;against <i>Venturia inaequalis</i> (Cooke) G. Winter</span>

  • Géza NAGY Corvinus University of Budapest, Faculty of Horticultural Sciences, Department of Plant Pathology, 44. Ménesi Str., H-1118 Budapest
  • Tamás HOCHBAUM Corvinus University of Budapest, Faculty of Horticultural Sciences, Department of Plant Pathology, 44. Ménesi Str., H-1118 Budapest
  • Szilvia SÁROSI Corvinus University of Budapest, Faculty of Horticultural Sciences, Department of Medicinal and Aromatic Plants, 29-43 Villány iStr., H-1118 Budapest
  • Márta LADÁNYI Corvinus University of Budapest, Faculty of Horticultural Sciences, Department of Biometrics and Agricultural Informatics, 29-43 Villányi Str., H-1118 Budapest

Abstract

The effect of the essential oils of thyme (Thymus vulgaris), cinnamon (Cinnamomum verum) and sweet orange (Citrus sinensis) on conidial germination of Venturia inaequalis was investigated in vitro. Moreover, the effect of cinnamon oil was further studied by analyzing its preventive and curative activity as well as its rainfastness in an apple seedling-Venturia pathosystem under growth chamber and greenhouse conditions. The essential oils suppressed the germination of conidia at concentrations of 0.01% and 0.1% effectively. The highest inhibition level was achieved with thyme oil. Cinnamon oil (0.2%) with Silwet Star adjuvant (0.02%) was protective and curative against Venturia inaequalis when applied 72 h, 24 h, 1 h before or 24 h, 72 h after inoculation of plants. Effective control was achieved when essential oil was applied by 24 h, 1 h or 24 h pre- or ost-inoculation, respectively. The 72 h application was less effective, however, it still showed decent control level. Although the simulated rainfall of light (1 mm), moderate (3 mm) and heavy (5 mm) rain decreased the control efficacy of cinnamon oil, the water amounts did not influence control level. The oil application resulted in a moderate and long lasting control (92% efficacy without rainfall, 65% efficacy with rainfall). The results of this study show that the tested essential oils are appropriate candidates for the development of biofungicides against apple scab.

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Author Biography

Géza NAGY, Corvinus University of Budapest, Faculty of Horticultural Sciences, Department of Plant Pathology, 44. Ménesi Str., H-1118 Budapest
Department of Plant Pathology, associate professor
Published
2014-06-03
How to Cite
NAGY, G., HOCHBAUM, T., SÁROSI, S., & LADÁNYI, M. (2014). In Vitro</span></i><span lang="EN-GB" style="font-size: 12.0pt; font-family: Times New Roman"> and <i>in Planta</i> Activity of Some Essential Oils&nbsp;against <i>Venturia inaequalis</i> (Cooke) G. Winter</span&gt;. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 42(1), 109-114. https://doi.org/10.15835/nbha4219503
Section
Research Articles