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| PEREIRA,G.A.M.; BARCELLOS JR.,L.H.; GONÇALVES,V.A.; SILVA,D.V.; FARIA,A.T.; SILVA,A.A.. |
| ABSTRACT Knowledge of herbicides sorption by colloids predicts its movement in the soil profile and its effectiveness in controlling weeds and crops poisoning when directly applied to the soil. This knowledge becomes even more important for herbicides which have long persistence in the soil. In this research, clomazone sorption was estimated by the biological method in Brazilian soil samples with different physical and chemical characteristics, cultivated with sugarcane crops. As an indicator of the presence of clomazone in the soil, Sorghum bicolor was used. The data relating to assessments of poisoning and accumulation of dry matter of the plants were subjected to multivariate analysis of similarity among variables. After that, clomazone doses that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbicide retention; Herbicide behavior in the soil; Pollution potential; Herbicides impact. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000200357 |
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| RAPOSO JR.,R.; PEREIRA,G.A.M.; MATOS,C.C.; BARCELLOS JR.,L.H.; PAULA,D.F.; SILVA,A.A.. |
| ABSTRACT: The 2-Chloroethylphosphonic acid (ethephon) and calcium carbide are used to induce and synchronize the flowering of pineapple crop. Some farmers have used the 2,4-D herbicide in combination with these flowering inducers. This practice is based on the hypothesis that 2,4-D would act as a growth regulator, increasing fruit size and weight. The objectives of this work was to verify if the use of 2,4-D, associated to calcium carbide or ethephon, influences the productivity and quality of the pineapple fruits and, also if the use of this herbicide leaves residues in the fruits. For this, two field experiments were carried out in two different farms. The treatments consisted of the application of ethephon and calcium carbide, alone, and in a mixture... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ananas comosus; Dichlorophenoxyacetic acid; Floral inducer; Plant growth regulator. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100174 |
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| PEREIRA,G.A.M.; BARCELLOS JR.,L.H.; GONÇALVES,V.A.; SILVA,D.V.; SILVA,A.A.. |
| ABSTRACT The chemical control of weed is a necessary practice in large-scale agriculture. However, when herbicides are used in the wrong way, they can remain into soil for long periods and/or be leached in its profile, and they may even contaminate groundwater. In this research, clomazone leaching in soil samples collected from different Brazilian regions was estimated by biological method. To do so, columns containing soils were used, and samples were collected every 5 cm. After preparing columns and applying a 1,500 g a.i. ha-1 clomazone dose, rain simulation was performed. Sorghum was used in order to detect the herbicide. More than 60% similarity was found for the studied variables; it was chosen to use only data referring to toxicity percentage.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbicide; Mobility in soil; Environmental impact. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100225 |
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