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ANALYSIS OF THE INITIAL GROWTH OF CASSAVA IN INTERCROPPING SYSTEM Sci. Agrar.Paran. / SAP
Ferreira, Evander Alves; Silva, Daniel Valadão; Braga, Renan Rodrigues; Oliveira, Maxwel Coura de; Pereira, Gustavo Antonio Mendes; Santos, José Barbosa dos; Sediyama, Tocio.
One of the main reasons why farmers in different regions prefer polycultures is that very often you can get higher yields in an area sown in polyculture than in monoculture with an equivalent area. Thus in systems polycultures the plants are in a state of permanent competition causing a reduction in plant growth consorts. The competition affects the production quantitatively and qualitatively, because it changes the efficiency of utilization of environmental resources such as water, light and nutrients, settling between culture and plants of other species existing on site. This competition also occurs between individuals of the same species or between biotypes prevalent in the area. Thus, the aim of this study was to evaluate the growth of two cultivars of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Produção vegetal; Agronomia.
Ano: 2014 URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/7498
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Glyphosate efficacy on sourgrass biotypes with suspected resistance collected in GR-crop fields Agronomy
Silveira, Hellen Martins da; Langaro, Ana Claudia; la Cruz, Ricardo Alcántara-de; Sediyama, Tocio; Silva, Antonio Alberto.
In Brazil, infestations of crop areas with glyphosate-resistant (GR) sourgrass (Digitaria insularis (L.) Fedde) biotypes has risen significantly, increasing crop production costs. Glyphosate efficacy on three biotypes (GO, BA and MT) of sourgrass with suspected resistance was evaluated. A susceptible biotype (MG) was used as the control. The results confirmed that the MG and GO biotypes were susceptible to glyphosate (control > 90%). The MG biotype exhibited growth reduction and mortality by 50% (GR50 and LD50, respectively) with mean glyphosate doses of 243.7 and 431.6 g ae ha-1. The resistance index of the biotypes with suspected resistance ranged from 2.8 to 6.1 in relation to GR50 and between 1.4 to 26.7 in relation to LD50. The glyphosate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chemical control; Digitaria insularis; Dose response; Resistance factor.; Fitotecnia; Fitotecnia.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35120
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Glyphosate efficacy on sourgrass biotypes with suspected resistance collected in GR-crop fields Agronomy
Silveira, Hellen Martins da; Langaro, Ana Claudia; la Cruz, Ricardo Alcántara-de; Sediyama, Tocio; Silva, Antonio Alberto.
In Brazil, infestations of crop areas with glyphosate-resistant (GR) sourgrass (Digitaria insularis (L.) Fedde) biotypes has risen significantly, increasing crop production costs. Glyphosate efficacy on three biotypes (GO, BA and MT) of sourgrass with suspected resistance was evaluated. A susceptible biotype (MG) was used as the control. The results confirmed that the MG and GO biotypes were susceptible to glyphosate (control > 90%). The MG biotype exhibited growth reduction and mortality by 50% (GR50 and LD50, respectively) with mean glyphosate doses of 243.7 and 431.6 g ae ha-1. The resistance index of the biotypes with suspected resistance ranged from 2.8 to 6.1 in relation to GR50 and between 1.4 to 26.7 in relation to LD50. The glyphosate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural Sciences chemical control; Digitaria insularis; Dose response; Resistance factor. Fitotecnia Fitotecnia.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35120
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