Título:	Preemergence herbicides on weed control in elephant grass pasture.
Autoria:	BRIGHENTI, A. M. CALSAVARA, L. H. F. VAROTTO, Y. V. G.
Afiliação:	ALEXANDRE MAGNO B DOS SANTOS, CNPGL; LEONARDO HENRIQUE FERREIRA CALSAVARA, EMATER; YAGO VIEIRA GUERRA VAROTTO, CES-JF.
Ano de publicação:	2016
Referência:	Ciência e Agrotecnologia, v. 40, n. 6, versão online e035215, 2016.
Páginas:	8 p.
Conteúdo:	Elephant grass (Pennisetum purpureum Schum.) is an important forage crop that has been proposed as a potential feedstock for bioenergy production. However, weed interference is a major factor limiting elephant grass production. Field experiments were conducted in 2014 and 2015 to evaluate preemergence herbicides for selective weed control in an elephant grass pasture. Herbicide treatments included atrazine + S-metolachlor, atrazine + simazine, ametryn, ethoxysulfuron, S-metolachlor, diuron + hexazinone, sulfentrazone, imazethapyr, and atrazine at label use rates. Weedy and weed-free treatments were included. Atrazine + S-metolachlor, atrazine + simazine, ametryn, ethoxysulfuron, S-metolachlor, sulfentrazone, and atrazine did not cause phytotoxicity on elephantgrass 35 days after treatment (DAT). However, diuron + hexazinone and imazethapyr were the most phytotoxic on elephantgrass, resulting in 81 and 70% phytotoxicity in 2014, and 7 and 6% phytotoxicity in 2015 respectively 35 DAT. All treatments provided effective weed control (>81%) with the exception of ethoxysulfuron (0 and 11% in 2014 and 2015, respectively), and atrazine (59% in 2014). These results show that atrazine + S-metolachlor, atrazine + simazine, ametryn, ethoxysulfuron, S-metolachlor, sulfentrazone, and atrazine were selectives when applied in preemergence in elephant grass pasture.
Thesagro:	Pennisetum Purpureum
NAL Thesaurus:	forage bioenergy
Palavras-chave:	Biofuel Napier grass
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPGL)