efeitos de três herbicidas pós-emergentes aplicados em diferentes horas do dia sobre ervas daninhas e plantas de soja [glycine max (l.) merrill] effects of three post-emergence herbicides applied at various day times on weeds and soybean plants [glycine max (l.) merrill]

Clicks: 265
ID: 206225
1980
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Abstract
O presente trabalho foi realizado na Estação Experimental Agronômica da UFRGS em 1978/79, com o objetivo de determinar a influência das condições ambientais ocorrentes em cinco horários de aplicação sobre três herbicidas pós-emergentes pulverizados sobre três espécies daninhas e sobre a cultura da soja. No experimento foram utilizados os produtos químicos acifluorfen, bentazon e dinoseb e as espécies daninhas Bidens pilosa L., Euphorbia heterophylla L. (em dois estádios de desenvolvimento), e Sida rhombifolia L. (em um estádio), como plantas teste. A ocorrência de baixa temperatura contribuiu para a redução do controle de Bidens pilosa L. com acifluorfen, enquanto condições de elevada umidade relativa do ar, contribuíram para aumentar o grau de controle de Euphorbia heterophylla L., principalmente quando pulverizada com dinoseb. Por outro lado, quanto mais eficiente foi o produto químico sobre determinada espécie, menor foi a interferência que sofreu dos fatores ambientais nos resultados alcançados no controle.
This research was conducted at the Agronomic Experimental Station UFRGS, Guaíba, RS, Brazil, during 1978/79, in order to study the influence of environmental conditions during five day times of spraying on the performance of three post-emergence herbicides applied over three weed species and soybeans. In this fi eld expe riment the compounds used were acifluorfen, bentazon and dinoseb, and the weed species tested were Bidens pilosa L., Euphorbia heterophylla L., in two growth stages and Sida rhombifolia L., in one stage. The occurrence of low temperature contributed to decrease the degree of Bidens pilosa L. control with acifluorfen, while high air humidity increased the degree of Euphorbia heterophylla L. control, mainly when this species was sprayed with dinoseb. On the other hand higher the herbicide efficiency on a particular weed species, the lower was the influence of the environmental conditions on the results attained on control.
Reference Key
gazziero1980plantaefeitos Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;D.L.P. Gazziero;N.G. Fleck
Journal anti-cancer agents in medicinal chemistry
Year 1980
DOI
10.1590/S0100-83581980000100004
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83581980000100004
Keywords
soybeans hours of applicationbiology (general)botany

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