Characterization and control of the causal agent of leaf spot in strawberry (Fragaria ananassa) under greenhouse conditions

Strawberry (Fragaria ananassa) plants showing symptoms of leaf spot were found in the producing areas of Manchay Bajo, Pachacamac District, Lima, Peru. The responsible pathogen was isolated and observed under a microscope to examine its morphological characteristics and the size of its structures, r...

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Autores principales:	C. Orellana, L. Mattos
Formato:	article
Lenguaje:	EN
Publicado:	Universidad Nacional Agraria La Molina 2019
Materias:	leaf spot corynespora cassiicola strawberry fragaria ananassa Agriculture (General) S1-972
Acceso en línea:	https://doaj.org/article/cbb51b84a8d24c758313e3fd9301a547
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spelling	oai:doaj.org-article:cbb51b84a8d24c758313e3fd9301a5472021-12-04T17:36:08ZCharacterization and control of the causal agent of leaf spot in strawberry (Fragaria ananassa) under greenhouse conditions2616-447710.21704/pja.v3i2.1315https://doaj.org/article/cbb51b84a8d24c758313e3fd9301a5472019-08-01T00:00:00Zhttps://revistas.lamolina.edu.pe/index.php/jpagronomy/article/view/1315https://doaj.org/toc/2616-4477Strawberry (Fragaria ananassa) plants showing symptoms of leaf spot were found in the producing areas of Manchay Bajo, Pachacamac District, Lima, Peru. The responsible pathogen was isolated and observed under a microscope to examine its morphological characteristics and the size of its structures, resulting in its identification as the fungus Corynespora cassiicola. Healthy strawberry plants that had been inoculated with C. cassiicola in a greenhouse developed lesions after 3 days and exhibited symptoms consisting of dark brown spots that had light brown centers and were surrounded by yellow halos, which coalesced and subsequently caused necrosis of the whole leaf. In vitro tests demonstrated that the fungus Trichoderma harzianum strain T-22 showed antagonistic activity against C. cassiicola, causing 41.8% mycelial growth inhibition, and the fungicides fosetyl-aluminum (Aliette®) and thiabendazole (Mertect®a) inhibited mycelial growth by 100.00% and 96.32%, respectively. However, in vivo, 0.75 g/L of the fungicide azoxystrobim (Stronsil®) gave the best control of C. cassiicola and the lowest area under the disease progress curve (AUDPC), followed by 1.5 mL/L of thiabendazole (Mertect) under greenhouse conditions. The isolate was found to be pathogenic, and its morphological identification was confirmed.C. OrellanaL. MattosUniversidad Nacional Agraria La Molinaarticleleaf spotcorynespora cassiicolastrawberryfragaria ananassaAgriculture (General)S1-972ENPeruvian Journal of Agronomy, Vol 3, Iss 2, Pp 57-67 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	leaf spot corynespora cassiicola strawberry fragaria ananassa Agriculture (General) S1-972
spellingShingle	leaf spot corynespora cassiicola strawberry fragaria ananassa Agriculture (General) S1-972 C. Orellana L. Mattos Characterization and control of the causal agent of leaf spot in strawberry (Fragaria ananassa) under greenhouse conditions
description	Strawberry (Fragaria ananassa) plants showing symptoms of leaf spot were found in the producing areas of Manchay Bajo, Pachacamac District, Lima, Peru. The responsible pathogen was isolated and observed under a microscope to examine its morphological characteristics and the size of its structures, resulting in its identification as the fungus Corynespora cassiicola. Healthy strawberry plants that had been inoculated with C. cassiicola in a greenhouse developed lesions after 3 days and exhibited symptoms consisting of dark brown spots that had light brown centers and were surrounded by yellow halos, which coalesced and subsequently caused necrosis of the whole leaf. In vitro tests demonstrated that the fungus Trichoderma harzianum strain T-22 showed antagonistic activity against C. cassiicola, causing 41.8% mycelial growth inhibition, and the fungicides fosetyl-aluminum (Aliette®) and thiabendazole (Mertect®a) inhibited mycelial growth by 100.00% and 96.32%, respectively. However, in vivo, 0.75 g/L of the fungicide azoxystrobim (Stronsil®) gave the best control of C. cassiicola and the lowest area under the disease progress curve (AUDPC), followed by 1.5 mL/L of thiabendazole (Mertect) under greenhouse conditions. The isolate was found to be pathogenic, and its morphological identification was confirmed.
format	article
author	C. Orellana L. Mattos
author_facet	C. Orellana L. Mattos
author_sort	C. Orellana
title	Characterization and control of the causal agent of leaf spot in strawberry (Fragaria ananassa) under greenhouse conditions
title_short	Characterization and control of the causal agent of leaf spot in strawberry (Fragaria ananassa) under greenhouse conditions
title_full	Characterization and control of the causal agent of leaf spot in strawberry (Fragaria ananassa) under greenhouse conditions
title_fullStr	Characterization and control of the causal agent of leaf spot in strawberry (Fragaria ananassa) under greenhouse conditions
title_full_unstemmed	Characterization and control of the causal agent of leaf spot in strawberry (Fragaria ananassa) under greenhouse conditions
title_sort	characterization and control of the causal agent of leaf spot in strawberry (fragaria ananassa) under greenhouse conditions
publisher	Universidad Nacional Agraria La Molina
publishDate	2019
url	https://doaj.org/article/cbb51b84a8d24c758313e3fd9301a547
work_keys_str_mv	AT corellana characterizationandcontrolofthecausalagentofleafspotinstrawberryfragariaananassaundergreenhouseconditions AT lmattos characterizationandcontrolofthecausalagentofleafspotinstrawberryfragariaananassaundergreenhouseconditions
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Characterization and control of the causal agent of leaf spot in strawberry (Fragaria ananassa) under greenhouse conditions

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