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Replacing Mancozeb with Alternative Fungicides for the Control of Late Blight in Potato

Mancozeb (MZ) is a broadly used fungicide for the control of plant diseases, including late blight in potatoes caused by the oomycete Phytophthora infestans (Mont.) De Bary. MZ has been banned for agricultural use by the European Union as of January 2022 due to its hazards to humans and the environm...

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Autores principales: Ben Naim, Yariv, Cohen, Yigal
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10672005/
https://www.ncbi.nlm.nih.gov/pubmed/37998852
http://dx.doi.org/10.3390/jof9111046
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author Ben Naim, Yariv
Cohen, Yigal
author_facet Ben Naim, Yariv
Cohen, Yigal
author_sort Ben Naim, Yariv
collection PubMed
description Mancozeb (MZ) is a broadly used fungicide for the control of plant diseases, including late blight in potatoes caused by the oomycete Phytophthora infestans (Mont.) De Bary. MZ has been banned for agricultural use by the European Union as of January 2022 due to its hazards to humans and the environment. In a search for replacement fungicides, twenty-seven registered anti-oomycete fungicidal preparations were evaluated for their ability to mitigate the threat of this disease. Fourteen fungicides provided good control (≥75%) of late blight in potted potato and tomato plants in growth chambers. However, in Tunnel Experiment 1, only three fungicides provided effective control of P. infestans in potatoes: Cyazofamid (Ranman, a QiI inhibitor), Mandipropamid (Revus, a CAA inhibitor), and Oxathiapiprolin + Benthiavalicarb (Zorvek Endavia, an OSBP inhibitor + CAA inhibitor). In Tunnel Experiment 2, these three fungicides were applied at the recommended doses at 7-, 9-, and 21-day intervals, respectively, totaling 6, 4, and 2 sprays during the season. At 39 days post-inoculation (dpi), control efficacy increased in the following order: Zorvec Endavia > Ranman > Revus > Mancozeb. Two sprays of Zorvec Endavia were significantly more effective in controlling the blight than six sprays of Ranman or four sprays of Revus. We, therefore, recommend using these three fungicides as replacements for mancozeb for the control of late blight in potatoes. A spray program that alternates between these three fungicides may be effective in controlling the disease and also in avoiding the build-up of resistance in P. infestans to mandipropamid and oxathiapiprolin.
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spelling pubmed-106720052023-10-25 Replacing Mancozeb with Alternative Fungicides for the Control of Late Blight in Potato Ben Naim, Yariv Cohen, Yigal J Fungi (Basel) Article Mancozeb (MZ) is a broadly used fungicide for the control of plant diseases, including late blight in potatoes caused by the oomycete Phytophthora infestans (Mont.) De Bary. MZ has been banned for agricultural use by the European Union as of January 2022 due to its hazards to humans and the environment. In a search for replacement fungicides, twenty-seven registered anti-oomycete fungicidal preparations were evaluated for their ability to mitigate the threat of this disease. Fourteen fungicides provided good control (≥75%) of late blight in potted potato and tomato plants in growth chambers. However, in Tunnel Experiment 1, only three fungicides provided effective control of P. infestans in potatoes: Cyazofamid (Ranman, a QiI inhibitor), Mandipropamid (Revus, a CAA inhibitor), and Oxathiapiprolin + Benthiavalicarb (Zorvek Endavia, an OSBP inhibitor + CAA inhibitor). In Tunnel Experiment 2, these three fungicides were applied at the recommended doses at 7-, 9-, and 21-day intervals, respectively, totaling 6, 4, and 2 sprays during the season. At 39 days post-inoculation (dpi), control efficacy increased in the following order: Zorvec Endavia > Ranman > Revus > Mancozeb. Two sprays of Zorvec Endavia were significantly more effective in controlling the blight than six sprays of Ranman or four sprays of Revus. We, therefore, recommend using these three fungicides as replacements for mancozeb for the control of late blight in potatoes. A spray program that alternates between these three fungicides may be effective in controlling the disease and also in avoiding the build-up of resistance in P. infestans to mandipropamid and oxathiapiprolin. MDPI 2023-10-25 /pmc/articles/PMC10672005/ /pubmed/37998852 http://dx.doi.org/10.3390/jof9111046 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ben Naim, Yariv
Cohen, Yigal
Replacing Mancozeb with Alternative Fungicides for the Control of Late Blight in Potato
title Replacing Mancozeb with Alternative Fungicides for the Control of Late Blight in Potato
title_full Replacing Mancozeb with Alternative Fungicides for the Control of Late Blight in Potato
title_fullStr Replacing Mancozeb with Alternative Fungicides for the Control of Late Blight in Potato
title_full_unstemmed Replacing Mancozeb with Alternative Fungicides for the Control of Late Blight in Potato
title_short Replacing Mancozeb with Alternative Fungicides for the Control of Late Blight in Potato
title_sort replacing mancozeb with alternative fungicides for the control of late blight in potato
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10672005/
https://www.ncbi.nlm.nih.gov/pubmed/37998852
http://dx.doi.org/10.3390/jof9111046
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