MANEJO DA VASSOURINHA-DE-BOTÃO (Spermacoce verticillata)

Abstract

Given that buttonweed is a weed that causes various damages, there has been an interest in aggregating all the knowledge acquired over the years in literature to discover the best ways to manage this weed, aiming for better control and less impact on the main crop and the environment. Different forms of control should be used together so that only traditional chemical control is not performed, inducing a selection pressure of resistant weeds. Cultural and mechanical control also contribute to the control of this species. Although buttonweed does not present cases of resistance, it is tolerant to glyphosate. Scientific studies show the efficiency of glyphosate application together with flumioxazin, chloransulam-methyl, 2,4-D, ammonium glufosinate salt, or saflufenacil, and can also be used in triple mixture with PROTOX inhibitors herbicides, which are saflufenacil, carfentrazone or flumioxazin. Other efficient mixtures in control are acifluorfen with bentazon, atrazine with simazine and 2,4-D with plicoram, besides mixtures of ammonium glufosinate salt with flumioxazin, saflufenacil, 2,4-D or imazethapyr. The mixture of pre-emergence herbicides such as pendimethalin with fomesafen, bentazon with imazamox or atrazine also shows efficiency. Despite the combination of herbicides demonstrating good control, the application of some isolated herbicides can also provide good results in the management of buttonweed, namely saflufenacil, carfentrazone-ethyl, flumioxazin, ammonium glufosinate salt and lactofen.