2017
DOI: 10.1590/0100-5405/2102
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Controle químico da mela-das-sementes e do carvão em cultivares de Brachiaria brizantha

Abstract: O Brasil é o maior produtor, consumidor e exportador mundial de sementes de espécies forrageiras tropicais. Contudo, a produção tem sido ameaçada pela presença de fungos e fitonematoides, os quais podem reduzir a produtividade e/ou a qualidade das sementes produzidas, além de constituírem barreiras sanitárias para vários países importadores dessas sementes. Em Brachiaria spp., as principais doenças são a mela-das-sementes e o carvão, causadas, respectivamente, pelos fungos Claviceps maximensis e Ustilago opert… Show more

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“…The presence of these microorganisms also affects the export of forage seeds (Fernandes, Marchi, Jerba, & Borges, 2005), since many countries impose phytosanitary restrictions. The use of fungicides in the soil may reduce the presence of the pathogen (Fernandes, Verzignassi, Mallmann, & Queiroz, 2017;Dung et al, 2018), but the selection of resistant forage grasses would be the most effective management (Miedaner & Geiger, 2015). Considering that Brazil is the leading producer and exporter of tropical seeds of forage grasses in the world (Silva et al, 2019), the commercialization of contaminated seed lots can affect mainly the foreign market, due to restrictions on the presence of Claviceps spp.…”
Section: Introductionmentioning
confidence: 99%
“…The presence of these microorganisms also affects the export of forage seeds (Fernandes, Marchi, Jerba, & Borges, 2005), since many countries impose phytosanitary restrictions. The use of fungicides in the soil may reduce the presence of the pathogen (Fernandes, Verzignassi, Mallmann, & Queiroz, 2017;Dung et al, 2018), but the selection of resistant forage grasses would be the most effective management (Miedaner & Geiger, 2015). Considering that Brazil is the leading producer and exporter of tropical seeds of forage grasses in the world (Silva et al, 2019), the commercialization of contaminated seed lots can affect mainly the foreign market, due to restrictions on the presence of Claviceps spp.…”
Section: Introductionmentioning
confidence: 99%
“…La infección primaria en el campo es posiblemente establecida por la germinación de esclerocios, conidios y/o restos de panículas contaminadas que quedan en el suelo (Cardoso Junior y Santos 1998). La incidencia de estos hongos ocurre con temperaturas frescas y alta humedad relativa, dándose preferentemente en el Paraguay en los meses de marzo a junio (Sarubbi 2016, Fernandes et al 2017.…”
Section: Introductionunclassified