Introduction and management of Amaranthus palmeri in Brazil

Abstract

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Glyphosate-resistant palmer amaranth, Amaranthus palmeri, a difficult to control weed with aggressive growth, capable of causing large yield losses in annual crops, was identified in Brazil, in the state of Mato Grosso, in 2015. After notification, an epidemiological survey was carried out to identify the place of entry and area of dispersion. Containment and eradication measures were quickly established by state and federal phytosanitary authorities through legislative measures. After identification, it was classified as a quarantine weed under official [...]