Fungos e nematoides associados a sementes de forrageiras tropicais

• Autor(a) principal: Mallmann, Guilherme
• Data de Publicação: 2013
• Outros Autores: Verzignassi, Jaqueline Rosemeire, Fernandes, Celso Dornelas, Santos, Jaime Maia Dos [UNESP], Vechiato, Marta Helena, Inácio, Carlos Antonio, Batista, Margareth Vieira, Queiroz, Carolina De Arruda
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S0100-54052013000300010; http://hdl.handle.net/11449/109961
• topic: Brachiaria brizantha; Panicum maximum; pathogen; Brachiaria brizantha; Panicum maximum; Patógeno

This study aimed to assess the incidence of fungi and nematodes in Brachiaria sp. and Panicum maximum seeds produced in the Brazilian states of Mato Grosso do Sul (MS), Mato Grosso (MT), Goiás (GO), Minas Gerais (MG) and São Paulo (SP). The main fungi found in the seeds were Bipolaris sp., Curvularia sp. and Phoma sp.. The lowest incidence of these fungi was found for seeds of Brachiaria brizantha cultivars BRS Piatã and Xaraés, and Brachiaria decumbens cv. Basilisk, from the states of GO, MG and MS, respectively. The cultivars Marandu and BRS Piatã, from several regions, exhibited high occurrence of Aphelenchoides sp. and Ditylenchus sp.. Seeds of B. humidicola cultivar Humidicola, produced in MS and SP, did not show association with nematodes. The seeds of Panicum maximum cv. Massai and cv. Mombaça showed higher incidence of Bipolaris sp., Cladosporium sp., Curvularia sp., Fusarium sp. and Phoma sp., as well as Aphelenchoides sp. and Ditylenchus sp., especially for seeds produced in MT. Some of the detected pathogens are causative agents of diseases of major importance in forage plants, such as Bipolaris sp., causing leaf spot in Panicum, of high severity in Tanzânia, which provides serious compromising of the pasture sustainability.