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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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Association of Mechanical and Chemical Methods for Cotton Stalk Destruction Planta Daninha
FRANCISCHINI,A.C.; CONSTANTIN,J.; MATTE,W.D.; OLIVEIRA JR.,R.S.; RIOS,F.A.; MACHADO,F.G..
ABSTRACT: The destruction of cotton stalks after harvesting is a prophylactic measure aimed at reducing the population of insects and disease inoculants that may remain in the crop residues and remaining cotton plants. The objective of this work was to evaluate integrated methods of management of the cotton stalks, combining mechanical and chemical control, to promote the eradication of cotton stalks. A 7x5 factorial experiment was installed where seven different methods of mechanical control of cotton stalk and five herbicide treatments were tested. The percentage of control (visual scale of 0 to 100%) and the number of plants regrowth per meter were evaluated at 14, 28 and 50 days after herbicide application treatment. At the end of the experiment, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gossypium hirsutum; Herbicides; Integrated management; Host-free period.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100162
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Glyphosate-Resistant Sourgrass Management Programs Associating Mowing and Herbicides Planta Daninha
RAIMONDI,R.T.; CONSTANTIN,J.; MENDES,R.R.; OLIVEIRA JR.,R.S.; RIOS,F.A..
ABSTRACT: Currently, sourgrass is one of the most important weeds in grain production areas in Brazil. The objective of this work was to evaluate the efficiency of associated systems composed by mowing and chemical control against clumped sourgrass. In the first experiment, different mowing heights (0, 5, 10, 15 and 20 cm), coupled with complementary applications of glyphosate + clethodim, were evaluated on sourgrass control. The second experiment was composed by programs starting with fallow mowing at different times, 50 (early), 35 (intermediate) and 20 (late) days before soybean sowing. After mowing, treatments were followed by herbicide applications according to the need until soybean harvest. The shorter the mowing height associated with herbicide...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digitaria insularis; Mechanical control; Soybean; Fallow.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100232
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