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| Tuesca,Daniel; Puricelli,Eduardo; Nisensohn,Luisa; Faccini,Delma; Papa,Juan. |
| Field studies were established in Zavalla and Oliveros, Argentina, during four years in order to optimize Johnsongrass (Sorghum halepense (L.) Pers.) chemical control by means of the thermal calendar model in comparison with other criteria (weed height or days after sowing). The effect of three application dates of postemergence herbicides was determined by visual control, density of tillers originated from rhizome bud regrowth, and from crown and shoot bud regrowth, and soybean yield. Following the thermal calendar model criterion, applications during the second date afforded the best control. Weed height for the first date showed little variability between experiments but was highly variable in the second and third application dates, achieving in some... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weeds; Herbicides; Application timing. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000500004 |
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| FARIA,A. T.; FERREIRA,E. A.; ROCHA,P. R. R.; SILVA,D. V.; SILVA,A. A.; FIALHO,C. M. T.; SILVA,A. F.. |
| ABSTRACT Growth regulators can be used to further retard or inhibit vegetative growth. In this sense, the objective of this study was to determine the effects of age and number of trinexapac-ethyl applications on the growth and yield of sugarcane. The experiment was in a randomized complete block design with four replications. The treatments were in a 3 x 2 + 2 factorial arrangement, where factor A corresponded to the application times of the plant growth regulator (120, 200 and 240 days after bud burst (DAB) of sugarcane) and factor B to the number of applications (one or two applications). In addition, two controls (one with three applications and another application without the regulator) were added. The application of trinexapac-ethyl decreased the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Growth regulator; Application timing; Number of applications. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000300491 |
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