title: Mycobiota of the weed Conyza canadensis (Asteraceae) in Brazil.
abstract: Conyza canadensis is a noxious and notably problematic weed in Brazil whose control is greatly challenging due to the appearance, in the last years, of herbicide resistant populations. An investigation regarding the associated pathogenic fungi of this plant was conducted in Brazil aimed at starting a biological control program to help mitigate its economic impact. Ten fungal species were yielded and described: two ascomycetes (Leptosphaerulina conyzicola sp. nov. and Wentiomyces melioloides), five hyphomycete asexual morphs (Alternaria tenuissima, Cercospora conyzicola sp. nov., Cercosporella virgaureae, and Fusarium fujikuroi), two coelomycete asexual morphs (Phoma conyzaphthora sp. nov., Septoria erigerontis), one rust fungus (Aecidium conyzicola sp. nov.), and one oomycete (Basidiophora entospora). Four among the fungi that were collected represent new taxa, and the others represented either new host-records of known fungal species or new geographic records or both, except for C. virgaureae that had already been recorded on C. canadensis in Brazil. None of the discovered species have any potential to be used as a mycoherbicide or to be introduced somewhere else, nevertheless, the knowledge about this mycobiota will help guide the selection of potential biocontrol agents to be introduced in Brazil.
authors: Departamento de Fitopatologia, Universidade Federal de Viçosa, Minas Gerais 36571-900, Brazil.
authors: Lidiane Leal
authors: LL
authors: Duarte
authors: Departamento de Fitopatologia, Universidade Federal de Viçosa, Minas Gerais 36571-900, Brazil.
authors: Fabiana Maria Coutinho
authors: FM
authors: Santos
authors: Departamento de Fitopatologia, Universidade Federal de Viçosa, Minas Gerais 36571-900, Brazil. Electronic address: rbarreto@ufv.br.
authors: Robert Weingart
authors: RW
authors: Barreto
mesh_terms: D044822:Biodiversity; D001938:Brazil; D016000:Cluster Analysis; D035401:Conyza / Q000382:microbiology*; D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000737:chemistry / Q000235:genetics; D003576:Electron Transport Complex IV / Q000235:genetics; D005658:Fungi / Q000145:classification* / Q000302:isolation & purification*; D020459:Genes, rRNA; D020652:Peptide Elongation Factor 2 / Q000235:genetics; D010802:Phylogeny; D057685:Plant Weeds / Q000382:microbiology*; D012331:RNA, Fungal / Q000235:genetics; D012335:RNA, Ribosomal / Q000235:genetics; D017422:Sequence Analysis, DNA
chemical_list: D004271:DNA, Fungal; D004275:DNA, Ribosomal; D021903:DNA, Ribosomal Spacer; D020652:Peptide Elongation Factor 2; D012331:RNA, Fungal; D012335:RNA, Ribosomal; C065096:RNA, ribosomal, 26S; D003576:Electron Transport Complex IV
keywords: Biodiversity; Morphology; Phylogenetic analysis; Plant disease; Taxonomy novelties