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Effective Management of Cucumber Powdery Mildew with Essential Oils

Author

Listed:
  • Yasser S. Mostafa

    (Biological Science Department, Faculty of Science, King Khalid University, Abha 61321, Saudi Arabia)

  • Mohamed Hashem

    (Biological Science Department, Faculty of Science, King Khalid University, Abha 61321, Saudi Arabia
    Botany and Microbiology Department, Faculty of Science, Assiut University, Assiut 71516, Egypt)

  • Ali M. Alshehri

    (Biological Science Department, Faculty of Science, King Khalid University, Abha 61321, Saudi Arabia)

  • Saad Alamri

    (Biological Science Department, Faculty of Science, King Khalid University, Abha 61321, Saudi Arabia)

  • Ebrahem M. Eid

    (Biological Science Department, Faculty of Science, King Khalid University, Abha 61321, Saudi Arabia
    Botany Department, Faculty of Science, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt)

  • El-Sayed H.E. Ziedan

    (Plant Pathology, National Research, Dokki, Cairo 12622, Egypt)

  • Sulaiman A. Alrumman

    (Biological Science Department, Faculty of Science, King Khalid University, Abha 61321, Saudi Arabia)

Abstract

This research evaluated the efficacy of essential oils in the management of cucumber powdery mildew. Essential oils of lemongrass, lemon, thyme, peppermint, abundance blend, purification blend, and thieves blend were tested in vitro and under greenhouse conditions in two separate experiments. The effects of essential oils were tested against powdery mildew disease at concentrations of 1.0–2.5 mL/L, and the consequent impact of the oils on plant growth was evaluated. Powdery mildew fungus, Podosphaera xanthii , was identified using sequencing of the ITS region. The essential oils significantly reduced disease incidence up to 77.3% compared with the positive control ( p < 0.5). Moreover, the essential oils increased the plant length (up to 187 cm), leaf area (up to 27.5 cm 2 ), fresh weight (up to 123 g), dry weight (up to 22.5 g), number of flowers (16.3), and metabolite content compared with the positive control ( p < 0.5). Cell membrane injury decreased significantly in the oil-treated pants ( p < 0.5), indicating the protective effect of essential oils. This study recommends the application of essential oils in an appropriate dose (2.5 mL/L) to protect cucumber plants against powdery mildew. Overdose of the oils (more than 2.5 mL/L) should be avoided due to adverse effects.

Suggested Citation

  • Yasser S. Mostafa & Mohamed Hashem & Ali M. Alshehri & Saad Alamri & Ebrahem M. Eid & El-Sayed H.E. Ziedan & Sulaiman A. Alrumman, 2021. "Effective Management of Cucumber Powdery Mildew with Essential Oils," Agriculture, MDPI, vol. 11(11), pages 1-16, November.
    • Handle: RePEc:gam:jagris:v:11:y:2021:i:11:p:1177-:d:684920
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    References listed on IDEAS

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    1. Jay Ram Lamichhane & Monika Bischoff-Schaefer & Sylvia Bluemel & Silke Dachbrodt-Saaydeh & Laure Dreux & Jean-Pierre Jansen & József Kiss & Jürgen Köhl & Per Kudsk & Thibaut Malausa & Antoine A. Messe, 2017. "Identifying obstacles and ranking common biological control research priorities for Europe to manage most economically important pests in arable, vegetable and perennial crops," Post-Print hal-02625012, HAL.
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