Potassium Fertilization Reduces the Severity of Leaf Spot Complex and Mosaic in Megathyrsus maximus Cultivars
, the Tanzânia cultivar showed lower leaf spot severity compared with the other cultivars, whereas at higher doses, no disease symptoms were observed in any cultivar. The area under the disease progress curve (AUDPC) for mosaic followed a linear model only for the Tanzânia cultivar, whereas quadratic regression models best described the response for the remaining cultivars, with maximum mosaic severity values of 67.74% for Quênia, 72.34% for Mombaça, 76.99% for Zuri, 74.88% for Massai, and 68.93% for Tamani. Increasing K doses reduced the severity of both the leaf spot complex and mosaic. However, the leaf spot complex did not affect the nutritional value of the evaluated cultivars.
Authors
- Antônio Leandro Chaves Gurgel (ORCID: https://orcid.org/0000-0001-5911-369X)
- Gustavo de Faria Theodoro (ORCID: https://orcid.org/0000-0002-1230-2124)
- Marislayne de Gusmão Pereira (ORCID: https://orcid.org/0000-0002-1117-890X)
- Juliana Caroline Santos Santana (ORCID: https://orcid.org/0000-0003-2303-3377)
- Gelson dos Santos Difante (ORCID: https://orcid.org/0000-0001-6610-8952)
- Jéssica Gomes Rodrigues (ORCID: https://orcid.org/0000-0002-8409-8572)
- Emmanuel Lievio de Lima Véras (ORCID: https://orcid.org/0000-0001-5156-5173)
- Alexandre Romeiro de Araújo (ORCID: https://orcid.org/0000-0003-1266-988X)
- Denise Baptaglin Montagner (ORCID: https://orcid.org/0000-0003-2688-8063)
- Gabriela Oliveira de Aquino Monteiro (ORCID: https://orcid.org/0000-0001-7655-4454)
- M L R Macedo
- Carolina Marques Costa Araújo
Institutions
- Universidade Federal de Mato Grosso do Sul (BR)
- Universidade Federal da Grande Dourados (BR)
- Brazilian Agricultural Research Corporation (BR)
- Universidade Federal do Piauí (BR)
- Universidade Federal do Rio Grande do Norte (BR)
- Núcleo de Pesquisas Aplicadas (Brazil) (BR)
- Centro Universitário do Rio Grande do Norte (BR)
- Universidade Estadual Paulista (Unesp) (BR)
Publication Details
- Journal
- Plants
- Published
- 2026-04-17
- DOI
- https://doi.org/10.3390/plants15081244
- Primary Topic
- Plant Pathogens and Resistance
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Fundação de Apoio ao Desenvolvimento do Ensino, Ciência e Tecnologia do Estado de Mato Grosso do Sul
- Universidade Federal de Mato Grosso do Sul