EFICIÊNCIA DE “MATRIZ D” E NOVAS VERSÕES + GLIFOSATO NO CONTROLE DE CORDA- DE-VIOLA (Ipomoea nil)

Abstract

The Viola Cord is a highly competitive weed for natural resources, possible host of pests and diseases, compromising the integrity of crop, and hindering, and, depending on infestation, make the act of mechanized harvesting unfeasible, reducing the productivity of the area. The chemical control of the guitar rope is currently the main method used, with glyphosate the most used herbicide in this method. Because it is a glyphosate tolerant plant, it is common to use adjuvants in the syrup, to enhance the absorption and effect of the product on the management of the unwanted plant. The present work aimed to evaluate the response of the viala rope submitted to glyphosate application, and new versions of the D matrix, using, as evaluation parameters, the inhibition of (5-epruuvil-shiquimate-3-phosphate) EPSPs, chlorophyll index assessment, visual phytotoxicity assessment and dry matter assessment. The experiment was conducted at a vegetation house, from the Goiano Federal Institute - Campus Morrinhos, consisting of 7 treatments and 4 repetitions, following block design at random. The treatments were: treatment 1 (matrix d - witness), treatment 2 (glyphosate), treatment 3 (d + glyphosate matrix), treatment 4 (SC 21/54 - 008 + glyphosate), treatment 5 (SC 21/54 - 009 + glyphosate), treatment 6 (SC 21/54 - 010+ glyphosate) and treatment 7 (SC 21/54 - 011 Glyphosate), visual phytotoxicity analysis indicated better efficiency of 5 and 6 treatments on the first day after application (DAA), not differentiating from other treatments on subsequent days. Regarding chlorofilog analysis, which measures chlorophyll content in plants, treatment 3 was the best result in its control. For the analysis of shymic acid accumulation and dry matter, there was no statistical difference between treatments and witness.