First Report of Bipolaris micropus, Curvularia geniculata, Epicoccum sorghinum, and Fusarium incarnatum on Paspalum guenoarum Seeds in Rio Grande do Sul, Brazil

Gasparetto, Bruno Frosi; Franke, Lucia Brandão; Andrade, Camila Cristina Lage de; Dalbosco, M.; Duarte, Viní­cius da Silva; Moreira, Silvino Intra; Alves, Eduardo

doi:10.1094/pdis-12-16-1746-pdn

Cited by 12 publications

(4 citation statements)

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“…and Epicoccum sorghinum (Sacc.) Aveskamp, Gruyter & Verkley, according to those reported by GASPARETTo et al (2017). The fungicides used to verify their fungitoxicities to the observed fungi were Carbendazim; Thiram (150 + 350 g/L), formulated as Derosal Plus™, Fludioxonil; Metalaxyl-M (25 + 10 g/L), formulated as Maxim XL™, Carboxina; Tiram (200 + 200 g/L), formulated as Vitavax-Thiram™, and Tiofanato-metílico (700 g/Kg), formulated as Cercobin 700 WP™, where carbendazim, metalaxyl-M, carboxina and tiofanatometílico are systemic fungicides.…”

Section: Methodsmentioning

confidence: 86%

“…The isolation, pathogenicity, molecular and morphological characterization of phytopathogenic fungi associated with P. guenoarum seeds from this batch were described by GASPARETTo et al (2017). The most frequent seed-associated fungal species tested in this research were Bipolaris micropus (Drechsler) Shoemaker, Curvularia geniculata (Tracy & Earle) Boedijn, Fusarium incarnatum (Desm.)…”

Section: Methodsmentioning

confidence: 97%

“…Despite the fact that several authors have detected phytopathogenic fungi associated with forage seeds (LA VALE et al, 2017;MALLMANN et al, 2013;SANToS et al, 2014), there is a relative lack of reports of the occurrence and control of fungal pathogens in P. guenoarum seeds. GASPARETTo et al (2017) has been one of the first reports to describe fungi associated with P. guenoarum seeds; although no attempts to control them was done so far.…”

Section: Introductionmentioning

confidence: 99%

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Fungi associated with Paspalum guenoarum seeds: their impact on physiology and control

et al. 2021

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Of the natural pastures grown in southern Brazil, those of the genus Paspalum are the most important. One of the factors that hinder their cultivation is the availability of quality seeds, that are often compromised by the presence of fungi. This study determined the in vitro sensitivity of Paspalum guenoarum ecotype azulão seed-associated fungus to certain fungicides and to measure the efficiency of chemical treatments for fungal control and seed physiological performance. Bipolaris micropus, Epicoccum sorghinum, Curvularia geniculata and Fusarium incarnatum associated with seeds were tested in vitro against Carbendazim; Tiram, Fludioxonil; Metalaxil-M, Carboxina; Tiram and Tiofanato-metílico at 0, 1, 2.5, 5, 10 and 30 µg/mL. This experiment was conducted in a completely randomized design (factorial 4 × 4 × 6). Qualitative variables were compared using the Tukey test (P ≤ 0.05) and quantitative variables were subjected to regression analysis. Carbendazim; Tiram and Fludioxonil; Metalaxil-M had the best fungicidal performances, each inhibiting three of the four fungi with LD50s below 1 µg/mL. Subsequently, these two fungicides were used alone or in combination in the in vivo test. A completely randomized design was used and the means were compared using the Tukey test (P < 0.05). The chemical treatment of the seeds resulted in improvement of five of the six evaluated physiological parameters. The identification of the primary fungi associated with Paspalum seeds reported in this research, as well as damage done to them, can be diminished using appropriate measures such as seed treatments.

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Section: Methodsmentioning

confidence: 86%

Section: Methodsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Fungi associated with Paspalum guenoarum seeds: their impact on physiology and control

et al. 2021

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“…The genus Epicoccum, is a cosmopolitan plant pathogen mainly found on grasses in tropical regions (De Oliveira et al 2018). Some species, including Paspalum guenoarum (Poaceae), have previously been reported in the Pampa territory of Brazil (Gasparetto et al 2017;Liu et al 2018;Zeng et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Endophytic fungi from an overlooked plant species: A case study in Kelissa brasiliensis (Baker) Ravenna

et al. 2022

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Studies involving endophytic fungi isolated from endemic plants and their antibacterial potential are largely unknown in the Pampa biome. In this study, we identified endophytic fungi isolated from Kelissa brasiliensis (Iridaceae), an endemic species of the Brazilian Pampa, and assessed their antibacterial activity. Endophytic fungi were first grouped based on macro-and micro-morphology, and one representative of each morphospecies was analyzed using sequences from the internal transcribed spacer (ITS) rDNA region. We then tested the fungal extracts against laboratory isolates of Staphylococcus aureus and Escherichia coli for antibacterial activity. A total of 30 endophytes were isolated from the tissues of K. brasiliensis, with the majority from the leaves. Endophytes were then grouped into seven morphospecies based on their morphological features and one representative from each was selected for phylogenetic analysis. The inference from the ITS rDNA sequences identified the endophytes of the seven selected morphospecies as belonging to six taxonomic groups: Colletotrichum (two), Diaporthe (one), Epicoccum (one), Fusarium (one), and Pestalotiopsis (one). The endophyte extracts revealed better results against E. coli than S. aureus, although the extracts from Colletotrichum and Pestalotiopsis sp. were statistically similar to the control antibiotic. Our study is a basis for endophytic fungi studies in Pampa.

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Epicoccum species: ubiquitous plant pathogens and effective biological control agents

2021

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First Report of Bipolaris micropus, Curvularia geniculata, Epicoccum sorghinum, and Fusarium incarnatum on Paspalum guenoarum Seeds in Rio Grande do Sul, Brazil

Cited by 12 publications

References 1 publication

Fungi associated with Paspalum guenoarum seeds: their impact on physiology and control

Fungi associated with Paspalum guenoarum seeds: their impact on physiology and control

Endophytic fungi from an overlooked plant species: A case study in Kelissa brasiliensis (Baker) Ravenna

Epicoccum species: ubiquitous plant pathogens and effective biological control agents

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