Data/hora: 09/06/2024 04:09:44

Provedor de dados: | Planta Daninha
País: | Brazil
Título: | Interference Periods in Soybean Crop as Affected by Emergence Times of Weeds
Autores: | ZANDONÁ,R.R.; AGOSTINETTO,D.; SILVA,B.M.; RUCHEL,Q.; FRAGA,D.S.
Data: | 2018-01-01
Ano: | 2018
Palavras-chave: | Glycine max; Weed competition; Crop yield losses.
Resumo: | ABSTRACT: Weeds emergence times modify competition with crops. Thus, the hypothesis was that the increase in weed emergence flow decreases the period prior to interference (PPI) in soybeans and increases the critical period of interference prevention (CPIP). The objective was to determine the PPI and the CPIP of weeds in soybean crops as affected by the preferred time of weeds emergence flow. Three experiments were conducted in the field in a randomized block design with four replications. The treatments were arranged in a factorial design with factor A consisting of coexistence or weed control in soybeans and factor B for eight periods (0, 7, 14, 21, 28, 35, 42 and 135 days after crop emergence (DAE)). The numbers of emerged plants and weed dry mass by genus and crop productivity were evaluated. The weed interference in culture during all the crop cycle reduces the soybean average yield 73, 94 and 89% in the first, second and third sowing times, respectively. Chemical control may be adopted at the end of PPI, which must be done at 14, 15 and 5 DAE crop, for the first, second, third times, respectively. The sowing in advance and intermediate time of recommendation increase the PPI in about 10 days, favoring the weed management in soybean crops.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100246
Editor: | Sociedade Brasileira da Ciência das Plantas Daninhas
Relação: | 10.1590/s0100-83582018360100045
Formato: | text/html
Fonte: | Planta Daninha  v.36 2018
Fonte: | info:eu-repo/semantics/openAccess