<abstract xmlns="http://www.w3.org/1999/xhtml"><p>This study aimed at investigating the antiviral activities of biocides made of formulated essential oils. These were derived from five plant species: fennel, oregano, peppermint, thyme and ginger. The potencies of these preparations were tested against local infection with the <italic>Tobacco necrosis virus</italic> (TNV) on common bean (<italic>Phaseolus vulgaris</italic> L.) and against systemic infection with the <italic>Cucumber mosaic virus</italic> (CMV) on cucumber (<italic>Cucumis sativus</italic> L.). After the determination of the most effective concentration, the formulated biocides were tested in protective and curative manners (before and after virus inoculation) against the growth of plants. The obtained results showed that the peppermint-derived biocide had the greatest effect on reducing the infectivity of the TNV virus (100% growth inhibition at 4000 ppm), whereas the biocide from thyme was the most effective against the infectivity of the CMV virus, as it induced a complete growth inhibition at 3000 ppm. The results of the protective and curative experiments revealed that the formulated biocides exerted high protection and curative effects against the two viruses. The observations revealed that the biocides were able to enhance plant defences against viral infection, as indicated by the increased levels of total chlorophyll, protein and phenols. Moreover, the levels of the oxidative stress markers including peroxidase (POD), polyphenol oxidase (PPO) and phenylalanine ammonia lyase (PAL) were improved compared to the control settings. In conclusion, the formulated biocides progressively present a favourable alternative to chemically synthesized pesticides in crop protection.</p></abstract>

This study aimed at investigating the antiviral activities of biocides made of formulated essential oils. These were derived from five plant species: fennel, oregano, peppermint, thyme and ginger. The potencies of these preparations were tested against local infection with the Tobacco necrosis virus (TNV) on common bean (Phaseolus vulgaris L.) and against systemic infection with the Cucumber mosaic virus (CMV) on cucumber (Cucumis sativus L.). After the determination of the most effective concentration, the formulated biocides were tested in protective and curative manners (before and after virus inoculation) against the growth of plants. The obtained results showed that the peppermint-derived biocide had the greatest effect on reducing the infectivity of the TNV virus (100% growth inhibition at 4000 ppm), whereas the biocide from thyme was the most effective against the infectivity of the CMV virus, as it induced a complete growth inhibition at 3000 ppm. The results of the protective and curative experiments revealed that the formulated biocides exerted high protection and curative effects against the two viruses. The observations revealed that the biocides were able to enhance plant defences against viral infection, as indicated by the increased levels of total chlorophyll, protein and phenols. Moreover, the levels of the oxidative stress markers including peroxidase (POD), polyphenol oxidase (PPO) and phenylalanine ammonia lyase (PAL) were improved compared to the control settings. In conclusion, the formulated biocides progressively present a favourable alternative to chemically synthesized pesticides in crop protection.

Use of biocides for controlling viral diseases that attack common bean and cucumber plants

Plant Researches Department Nuclear Research Center

Folia Horticulturae

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

This study aimed at investigating the antiviral activities of biocides made of formulated essential oils. These were derived from five plant species: fennel,...

Use of biocides for controlling viral diseases that attack common bean and cucumber plants

Published Online: Jun 30, 2019

Page range: 159 - 170

Received: May 26, 2018

Accepted: Oct 15, 2018

DOI: https://doi.org/10.2478/fhort-2019-0011

Keywords
biochemical analysis, essential oil,

© 2019 Ismail Mohamed Helal, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Use of biocides for controlling viral diseases that attack common bean and cucumber plants

Published Online: Jun 30, 2019

Page range: 159 - 170

Received: May 26, 2018

Accepted: Oct 15, 2018

DOI: https://doi.org/10.2478/fhort-2019-0011

Keywordsbiochemical analysis, essential oil,

© 2019 Ismail Mohamed Helal, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
biochemical analysis, essential oil,