Tolerance of triazole-based fungicides by biocontrol agents used to control Fusarium head blight in wheat in Argentina

Fusarium head blight (FHB) caused by Fusarium graminearum species complex is a devastating disease that causes extensive yield and quality losses to wheat around the world. Fungicide application and breeding for resistance are among the most important tools to counteract FHB. Biological control is a...

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Autores principales: Palazzini, J.M., Torres, A.M., Chulze, S.N.
Formato: JOUR
Materias:
Bacillus
biocontrol
fungicide tolerance
Fusarium head blight
integrated management
Streptomyces
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02668254_v66_n5_p434_Palazzini
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_02668254_v66_n5_p434_Palazzini
record_format dspace
spelling todo:paper_02668254_v66_n5_p434_Palazzini2023-10-03T15:13:28Z Tolerance of triazole-based fungicides by biocontrol agents used to control Fusarium head blight in wheat in Argentina Palazzini, J.M. Torres, A.M. Chulze, S.N. Bacillus biocontrol fungicide tolerance Fusarium head blight integrated management Streptomyces Fusarium head blight (FHB) caused by Fusarium graminearum species complex is a devastating disease that causes extensive yield and quality losses to wheat around the world. Fungicide application and breeding for resistance are among the most important tools to counteract FHB. Biological control is an additional tool that can be used as part of an integrated management of FHB. Bacillus velezensisRC 218, Brevibacillus sp. RC 263 and Streptomyces sp. RC 87B were selected by their potential to control FHB and deoxynivalenol production. The aim of this work was to test the tolerance of these biocontrol agents to triazole-based fungicides such as prothioconazole, tebuconazole and metconazole. Bacterial growth was evaluated in Petri dishes using the spread plating technique containing the different fungicides. Bacillus velezensisRC 218 and Streptomyces sp. RC 87B showed better tolerance to fungicides than Brevibacillus sp. RC 263. Complete growth inhibition was observed at concentrations of 20 μg ml−1 for metconazole, 40 μg ml−1 for tebuconazole and 80 μg ml−1 for prothioconazole. The results obtained indicate the possibility of using these biocontrol agents in combination with fungicides as part of an integrated management to control FHB of wheat. Significance and Impact of the Study: This study evaluates the possibility to use biocontrol agents (Bacillus velezensisRC 218, Brevibacillus sp. RC 263 and Streptomyces sp. RC 87B) in combination with triazole-based fungicides to control Fusarium head blight in wheat. The evaluation of biocontrol agents′ growth under in vitro conditions was carried out in Petri dishes containing either prothioconazole, tebuconazole or metconazole. Viability studies demonstrated that B. velezensisRC 218 and Streptomyces sp. RC 87B were more tolerant to the fungicides evaluated. Results obtained reflect the possibility to use fungicides at low doses combined with biocontrol agents. © 2018 The Society for Applied Microbiology JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02668254_v66_n5_p434_Palazzini
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Bacillus
biocontrol
fungicide tolerance
Fusarium head blight
integrated management
Streptomyces
spellingShingle Bacillus
biocontrol
fungicide tolerance
Fusarium head blight
integrated management
Streptomyces
Palazzini, J.M.
Torres, A.M.
Chulze, S.N.
Tolerance of triazole-based fungicides by biocontrol agents used to control Fusarium head blight in wheat in Argentina
topic_facet Bacillus
biocontrol
fungicide tolerance
Fusarium head blight
integrated management
Streptomyces
description Fusarium head blight (FHB) caused by Fusarium graminearum species complex is a devastating disease that causes extensive yield and quality losses to wheat around the world. Fungicide application and breeding for resistance are among the most important tools to counteract FHB. Biological control is an additional tool that can be used as part of an integrated management of FHB. Bacillus velezensisRC 218, Brevibacillus sp. RC 263 and Streptomyces sp. RC 87B were selected by their potential to control FHB and deoxynivalenol production. The aim of this work was to test the tolerance of these biocontrol agents to triazole-based fungicides such as prothioconazole, tebuconazole and metconazole. Bacterial growth was evaluated in Petri dishes using the spread plating technique containing the different fungicides. Bacillus velezensisRC 218 and Streptomyces sp. RC 87B showed better tolerance to fungicides than Brevibacillus sp. RC 263. Complete growth inhibition was observed at concentrations of 20 μg ml−1 for metconazole, 40 μg ml−1 for tebuconazole and 80 μg ml−1 for prothioconazole. The results obtained indicate the possibility of using these biocontrol agents in combination with fungicides as part of an integrated management to control FHB of wheat. Significance and Impact of the Study: This study evaluates the possibility to use biocontrol agents (Bacillus velezensisRC 218, Brevibacillus sp. RC 263 and Streptomyces sp. RC 87B) in combination with triazole-based fungicides to control Fusarium head blight in wheat. The evaluation of biocontrol agents′ growth under in vitro conditions was carried out in Petri dishes containing either prothioconazole, tebuconazole or metconazole. Viability studies demonstrated that B. velezensisRC 218 and Streptomyces sp. RC 87B were more tolerant to the fungicides evaluated. Results obtained reflect the possibility to use fungicides at low doses combined with biocontrol agents. © 2018 The Society for Applied Microbiology
format JOUR
author Palazzini, J.M.
Torres, A.M.
Chulze, S.N.
author_facet Palazzini, J.M.
Torres, A.M.
Chulze, S.N.
author_sort Palazzini, J.M.
title Tolerance of triazole-based fungicides by biocontrol agents used to control Fusarium head blight in wheat in Argentina
title_short Tolerance of triazole-based fungicides by biocontrol agents used to control Fusarium head blight in wheat in Argentina
title_full Tolerance of triazole-based fungicides by biocontrol agents used to control Fusarium head blight in wheat in Argentina
title_fullStr Tolerance of triazole-based fungicides by biocontrol agents used to control Fusarium head blight in wheat in Argentina
title_full_unstemmed Tolerance of triazole-based fungicides by biocontrol agents used to control Fusarium head blight in wheat in Argentina
title_sort tolerance of triazole-based fungicides by biocontrol agents used to control fusarium head blight in wheat in argentina
url http://hdl.handle.net/20.500.12110/paper_02668254_v66_n5_p434_Palazzini
work_keys_str_mv AT palazzinijm toleranceoftriazolebasedfungicidesbybiocontrolagentsusedtocontrolfusariumheadblightinwheatinargentina
AT torresam toleranceoftriazolebasedfungicidesbybiocontrolagentsusedtocontrolfusariumheadblightinwheatinargentina
AT chulzesn toleranceoftriazolebasedfungicidesbybiocontrolagentsusedtocontrolfusariumheadblightinwheatinargentina
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