Sabiia Seb
        Busca avançada

Botão Atualizar

Botão Atualizar

Registro completo
Provedor de dados:  Planta Daninha
País:  Brazil
Título:  Monitoring of Resistance of Sourgrass to Glyphosate Herbicide in Urban Areas of the State of São Paulo, Brazil
Autores:  GAZOLA,T.
Data:  2019-01-01
Ano:  2019
Palavras-chave:  Shikimic acid
Digitaria insularis
Resumo:  ABSTRACT: The objective of this work was to monitor the resistance of sourgrass (Digitaria insularis) to glyphosate in urban areas of the State of São Paulo to understand the spread of resistant biotypes. Three experiments were conducted under greenhouse conditions in a completely randomized design, with four replications. In the first experiment, seven sourgrass biotypes were used, and the control of plants was evaluated at 7, 14, 21, 28, and 35 days after application (DAA) of glyphosate. In the second experiment, the shikimic acid accumulation was quantified at 72 hours after the glyphosate application, and the same evaluations of weed control were performed. In the third experiment, rate-response curves were developed, with glyphosate at rates of 0, 90, 180, 360, 720, 1,440, 2,880, and 5,760 g a.e. ha-1 applied on three progenies obtained from self-fertilized seeds; the percentage of control and shoot dry weight of the plants were evaluated at 28 DAA to determine their resistance factor. The results confirmed the occurrence of biotypes of sourgrass resistant to glyphosate in urban areas of Ipaussu and Santa Cruz do Rio Pardo and transmission of this resistance to the progenies obtained from self-fertilized seeds. These results indicate the possibility of resistant sourgrass seeds to be transported and disseminated to other Brazilian regions, thus, contributing to increase cases of resistance of sourgrass to this herbicide. However, it should be confirmed by more detailed studies involving DNA and family trees to determine the genetic proximity between resistant biotypes from different regions, since independent selection may also occur.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Sociedade Brasileira da Ciência das Plantas Daninhas
Relação:  10.1590/s0100-83582019370100121
Formato:  text/html
Fonte:  Planta Daninha v.37 2019
Direitos:  info:eu-repo/semantics/openAccess

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC:

Valid HTML 4.01 Transitional