Fungal pathogens of Hyparrhenia rufa (Nees) Stapf., an invasive weed in Puerto Rico, and their potential as biological control agents
Hongos patógenos de Hyparrhenia rufa, una maleza invasiva en Puerto Rico, y su potencial como agentes de control biológico
| dc.creator | Rivera-Andújar, Verónica | |
| dc.creator | ||
| dc.creator | ||
| dc.date | 2016-10-01 | |
| dc.identifier | https://revistas.upr.edu/index.php/jaupr/article/view/12733 | |
| dc.identifier | 10.46429/jaupr.v100i2.12733 | |
| dc.description | Hyparrhenia rufa (Nees) Stapf., commonly known as jaragüa, faragüa or yaragüa grass, is an aggressive weed that has invaded cropland in Puerto Rico. To reduce the application of herbicides, the use of phytopathogenic fungi has been proposed for its control. Four fungal isolates associated with foliage lesions of H. rufa were identified as Curvularia sp., Fusarium sp., Phoma sorghina and Sphaeropsis sp. Their pathogenicity was tested under laboratory, greenhouse and field conditions. All fungal species were pathogenic in wounded tissues under laboratory conditions, whereas P. sorghina and Sphaeropsis sp. were the most virulent species under greenhouse conditions. Fusarium sp. was the most virulent in a field assay. All fungal isolates showed low levels of infection (level 1) in the field. Disease severity was estimated at 25% of the experimental plot area. To comply with Koch's postulates, all inoculated fungi were re-isolated on potato dextrose agar after pathogenicity tests conducted under laboratory, greenhouse and field conditions. This is the first report of Curvularia sp., Fusarium sp., P. sorghina and Sphaeropsis sp. as foliar pathogens of H. rufa. | en-US |
| dc.description | Hyparrhenia rufa (Nees) Stapf., conocida comúnmente como pasto jaragüa, faragüa o yaragüa, es una maleza agresiva que ha invadido terrenos cultivables en Puerto Rico. Para disminuir la aplicación de herbicidas, se ha propuesto el uso de hongos fitopatógenos para su control. Se identificaron cuatro aislados de hongos asociados a lesiones foliares de H. rufa: Curvularia sp., Fusarium sp., Phoma sorghina y Sphaeropsis sp. Se evaluó su patogenicidad en condiciones de laboratorio, invernadero y campo. Todas las especies de hongos fueron patogénicas al tejido foliar (con herida) en condiciones de laboratorio mientras que P. sorghina y Sphaeropsis sp. fueron las especies más virulentas en el ensayo de invernadero. Fusarium sp. fue la especie más virulenta en el ensayo de campo. Se observaron bajos niveles de infección (nivel 1) en el campo para todos los aislados de hongos evaluados. La severidad de la enfermedad fue estimada en un 25% del área de la parcela experimental. Para completar los postulados de Koch, todos los hongos inoculados fueron re-aislados en agar de papa y dextrosa luego de concluir las pruebas de patogenicidad conducidas en condiciones de laboratorio, invernadero y campo. Este es el primer reporte de Curvularia sp., Fusarium sp., P. sorghina and Sphaeropsis sp. como patógenos foliares de H. rufa. | es-ES |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | University of Puerto Rico Mayagüez Campus Agricultural Experiment Station | en-US |
| dc.relation | https://revistas.upr.edu/index.php/jaupr/article/view/12733/10476 | |
| dc.rights | Derechos de autor 2018 Journal of Agriculture of the University of Puerto Rico. (Etapa III) | es-ES |
| dc.source | The Journal of Agriculture of the University of Puerto Rico; Vol. 100 No. 2 (2016): Vol. 100, No. 2, October 2016; 237-247 | en-US |
| dc.source | Journal of Agriculture of the University of Puerto Rico; Vol. 100 Núm. 2 (2016): Vol. 100, No. 2, October 2016; 237-247 | es-ES |
| dc.source | 2308-1759 | |
| dc.source | 0041-994X | |
| dc.source | 10.46429/jaupr.v100i2 | |
| dc.subject | Invasive weed | en-US |
| dc.subject | Hyparrhenia rufa | en-US |
| dc.subject | Jaragüa grass | en-US |
| dc.subject | Curvularia sp. | en-US |
| dc.subject | Fusarium sp. | en-US |
| dc.subject | Phoma sorghina | en-US |
| dc.subject | Sphaeropsis sp. | en-US |
| dc.subject | Biocontrol | en-US |
| dc.subject | Pathogenic fungi | en-US |
| dc.subject | Fungi | en-US |
| dc.subject | Weeds--Control | en-US |
| dc.subject | Weeds--Biological control--Puerto Rico | en-US |
| dc.title | Fungal pathogens of Hyparrhenia rufa (Nees) Stapf., an invasive weed in Puerto Rico, and their potential as biological control agents | en-US |
| dc.title | Hongos patógenos de Hyparrhenia rufa, una maleza invasiva en Puerto Rico, y su potencial como agentes de control biológico | es-ES |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion |