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Competition of Amaranthus species with dry bean plants Scientia Agricola
Carvalho,Saul Jorge Pinto de; Christoffoleti,Pedro Jacob.
Weeds compete with field crops mainly for water, light and nutrients, and this competition is among other factors, a function of the occurrence of weed density, and the intrinsic competitive ability of each vegetal species. The objective of this research was to evaluate the competitive ability of five weed species of the Amaranthus L. genus (A. deflexus, A. hybridus, A. retroflexus, A. spinosus and A. viridis) with dry bean plants (Phaseolus vulgaris L. - 'Carioca Precoce' cultivar), using the replacement series design. A fixed total density equivalent to 80 plants m-2 was used in pots of 2.8 L capacity varying the proportions between the species in coexistence. To install the experiment, Amaranthus seedlings were transplanted to the pots at the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phaseolus vulgaris L.; Pigweed; Competitiveness; Dry mass.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000300003
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Dose-response curve to soil applied herbicides and susceptibility evaluation of different amaranthus species using model identity Planta Daninha
RAIMONDI,M.A.; OLIVEIRA J.R.,R.S.; CONSTANTIN,J.; RIOS,F.A.; GEMELLI,A.; RAIMONDI,R.T..
Greenhouse studies were conducted in 2008-2009 with the objective of adjusting dose-response curves of the main soil-applied herbicides currently used in cotton for the control of Amaranthus viridis, A. hybridus, A. spinosus, A. lividus, as well as comparing susceptibility among different species, using the identity test models. Thirty six individual experiments were simultaneously carried out in greenhouse, in a sandy clay loam soil (21% clay, 2.36% OM) combining increasing doses of the herbicides alachlor, clomazone, diuron, oxyfluorfen, pendimethalin, prometryn, S-metolachlor, and trifluralin applied to each species. Dose-response curves were adjusted for visual weed control at 28 days after herbicide application and doses required for 80% (C80) and 95%...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cotton; Dose-response curve; Pigweed; Tolerance.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000100137
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