|
| << vorige |
Tijdschrift beschrijving
Alle jaargangen van het bijbehorende tijdschrift
Alle afleveringen van het bijbehorende jaargang
Alle artikelen van de bijbehorende aflevering
Details van artikel 3 van 3 gevonden artikelen
| Titel: |
WEED CONTROL IN MAIZE BY USING PRE-EMERGENCE HERBICIDES CONTROLE DE PLANTAS DANINHAS NA CULTURA DO MILHO POR MEIO DE HERBICIDAS APLICADOS EM PRÉ-EMERGÊNCIA |
| Auteur: |
Hugo de Almeida Dan Alberto Leão de Lemos Barroso Lilian Gomes de Moraes Dan Thiago Rezende Finotti Cleriston Feldkircher Vanessa Soares Santos |
| Verschenen in: |
Pesquisa agropecuária tropical |
| Paginering: | Jaargang 40 (2010) nr. 4 pagina's xx |
| Jaar: |
2010 |
| Inhoud: |
<p style="margin-bottom: 0cm; font-style: normal; font-weight: normal; line-height: 120%; text-decoration: none;" lang="pt-BR" align="JUSTIFY"><span style="color: #000000;"><span style="font-family: Times New Roman,serif;"><span style="font-size: x-small;"><span style="font-size: x-small;"><span style="font-size: small;">This study aimed to estimate the effectiveness of weed control in maize (</span></span><span style="font-size: x-small;"><span style="font-size: small;"><em>Zea mays</em></span></span><span style="font-size: x-small;"><span style="font-size: small;"> L.), under a no-till system, in the </span></span><span style="font-size: x-small;"><span style="font-size: small;"><em>Cerrado</em></span></span><span style="font-size: x-small;"><span style="font-size: small;"> (Brazilian Savanna) region, by applying pre-emergence herbicides. Two experiments were carried out in Montevidiu, Goiás State, Brazil, during the 2007/2008 crop, in a randomized block design, with four replications. The following treatments were evaluated: atrazine (1,600 g ha</span></span><span style="font-size: x-small;"><sup><span style="font-size: small;">-1</span></span><span style="font-size: x-small;"><span style="font-size: small;">), atrazine + s-metolachor (1,665 g ha</span></span><span style="font-size: x-small;"><sup><span style="font-size: small;">-1</span></span><span style="font-size: x-small;"><span style="font-size: small;"> + 1,305 g ha</span></span><span style="font-size: x-small;"><sup><span style="font-size: small;">-1</span></span><span style="font-size: x-small;"><span style="font-size: small;">), s-metolachor (1,680 g ha</span></span><span style="font-size: x-small;"><sup><span style="font-size: small;">-1</span></span><span style="font-size: x-small;"><span style="font-size: small;">), atrazine + simazine (250 g ha</span></span><span style="font-size: x-small;"><sup><span style="font-size: small;">-1</span></span><span style="font-size: x-small;"><span style="font-size: small;"> + 250 g ha</span></span><span style="font-size: x-small;"><sup><span style="font-size: small;">-1</span></span><span style="font-size: x-small;"><span style="font-size: small;">), and control with and without weeds. It was found out that, 28 days after the treatments application, the herbicides atrazine and s-metolachor were not effective in controlling </span></span><span style="font-size: x-small;"><span style="font-size: small;"><em>Cenchrus echinatus</em></span></span><span style="font-size: x-small;"><span style="font-size: small;"> and </span></span><span style="font-size: x-small;"><span style="font-size: small;"><em>Alternanthera tenella</em></span></span><span style="font-size: x-small;"><span style="font-size: small;">, respectively. The associations between atrazine + s-metolachor and atrazine + simazine have provided significant increases in the </span></span><span style="font-size: x-small;"><span style="font-size: small;"><em>Euphorbia heterophilla </em></span></span><span style="font-size: x-small;"><span style="font-size: small;">and </span></span><span style="font-size: x-small;"><span style="font-size: small;"><em>Alternanthera tenella </em></span></span><span style="font-size: x-small;"><span style="font-size: small;">control. The presence of weeds had a negative effect on crop yield.</span></span></span></span></span></p> <p style="margin-bottom: 0cm; font-style: normal; font-weight: normal; line-height: 120%; text-decoration: none;" lang="pt-BR" align="JUSTIFY"><span style="color: #000000;"><span style="font-family: Times New Roman,serif;"><span style="font-size: x-small;"><span style="font-size: small;"><span lang="en-US">KEY-WORDS: </span></span><em><span style="font-size: small;"><span lang="en-US"><em>Zea mays</em></span></span></em><span style="font-size: small;"><span lang="en-US">; atrazine; s-metolachor; simazine; no-tillage.</span></span></span></span></span></p> <p style="margin-bottom: 0cm; font-style: normal; font-weight: normal; line-height: 120%; text-decoration: none;" lang="pt-BR" align="JUSTIFY"><span style="color: #000000;"><span style="font-family: Times New Roman,serif;"><span style="font-size: x-small;"><span style="font-size: small;">Este trabalho teve por objetivo estimar a eficácia do controle de plantas daninhas na cultura do milho (</span><em><span style="font-size: small;"><em>Zea mays</em></span></em><span style="font-size: small;"> L.), cultivado em sistema plantio direto, em região de Cerrado, por meio da aplicação, em pré-emergência, de herbicidas. Foram realizados dois ensaios, no município de Montevidiu (GO), durante a safra 2007/2008, dispostos em delineamento de blocos ao acaso, com quatro repetições. Foram avaliados os seguintes tratamentos: atrazine (1.600 g ha</span><sup><span style="font-size: small;">-1</span><span style="font-size: small;">), atrazine + s-metolachor (1.665 g ha</span><sup><span style="font-size: small;">-1</span><span style="font-size: small;"> + 1.305 g ha</span><sup><span style="font-size: small;">-1</span><span style="font-size: small;">), s-metolachor (1.680 g ha</span><sup><span style="font-size: small;">-1</span><span style="font-size: small;">), atrazine + simazine (250 g ha</span><sup><span style="font-size: small;">-1</span><span style="font-size: small;"> + 250 g ha</span><sup><span style="font-size: small;">-1</span><span style="font-size: small;">) e testemunha com e sem a presença de plantas daninhas. Aos 28 dias após a aplicação dos tratamentos, constatou-se que os herbicidas atrazine e s-metolachor não foram eficientes no controle de </span><span style="font-size: small;"><em>Cenchrus echinatus </em></span><span style="font-size: small;">e</span><span style="font-size: small;"><em> Alternanthera tenella</em></span><span style="font-size: small;">,</span><span style="font-size: small;"><em> </em></span><span style="font-size: small;">respectivamente. As associações entre os herbicidas atrazina + s-metolachor e atrazine + simazine proporcionaram incrementos significativos no controle de </span><span style="font-size: small;"><em>Euphorbia heterophilla </em></span><span style="font-size: small;">e</span><span style="font-size: small;"><em> Alternanthera tenella.</em></span><span style="font-size: small;"> A presença de plantas daninhas influenciou negativamente na produtividade da cultura.</span></span></span></span></p> <p style="margin-bottom: 0cm; font-style: normal; font-weight: normal; line-height: 120%; text-decoration: none;" lang="pt-BR" align="JUSTIFY"><span style="color: #000000;"><span style="font-family: Times New Roman,serif;"><span style="font-size: x-small;"><span style="font-size: small;">PALAVRAS-CHAVE: </span><em><span style="font-size: small;"><em>Zea mays</em></span></em><span style="font-size: small;">; atrazine; s-metolachor; simazine; plantio direto.</span></span></span></span></p> |
| Uitgever: |
Escola de Agronomia e Engenharia de Alimentos - UFG (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 3 gevonden artikelen
| << vorige |