Revista Brasileira De Herbicidas 2009; 8(1): 11-18
Ananas erectifolius Growth Under Effect of Glyphosate Low Doses
DOI: 10.7824/rbh.v8i1.63
Amazonian native plant, Ananas erectifolius has been a specie of great interest for automobile industry, due to the fibers contained in its leaves that show resistance, softness and reduced weight. Some studies about simulation of glyphosate drift have been demonstrating the occurrence of tolerance and/or incentives of dossel growth of some vegetable species. This way, with the objective of evaluating the effects of glyphosate subdoses application in growth, development and yield of Ananas erectifolius an experiment was conducted in field conditions at Fazenda Pematec Triangel do Brasil Ltda, Santarém County, PA State. Studied treatments were constituted by glyphosate application in the concentrations of 0.0; 11.2; 22.5; 45.0; 90.0; 180.0; 360.0 g a.e. ha-1 and a hoe check. Ananas erectifolius plants presented low tolerance to glyphosate herbicide, and superior subdoses to 45.0 g a.e. ha-1 promoted the most significant reductions of benefitted leaves yield when applied in post-emergency. None of the studied subdoses promoted incentive or increase of Ananas erectifolius plants vegetative development.
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