Plantas de cobertura de solo como hospedeiras alternativas de Colletotrichum guaranicola

Miléo, L.J.; Bentes, J. L. S.; Silva, J.F.; Christoffoleti, Pedro Jacob

doi:10.1590/s0100-83582006000400008

Cited by 9 publications

(13 citation statements)

References 6 publications

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“…In Brazil, S. latifolia has been reported as problematic because it is difficult to control, especially in areas of soybean crops, as a result of resistance to glyphosate (Costa, Alves, & Pavani, 2002;Galon, Agostinetto, & Vargas, 2009). P. conjugatum and P. phaseoloides have also been reported very often in areas of guarana (Mileo, Bentes, Silva, & Christoffoleti, 2006) and citrus (Gonçalves, 2015) plants. They are considered to be weed plants because they compete with crops for factors of production and are alternative hosts of the fungus Colletotrichum guaranicola, the pathogen of the main disease affecting guarana plants (Mileo et al, 2006).…”

Section: Resultsmentioning

confidence: 99%

Biomass Production and Mineral Nutrient Accumulation by Weeds and Sweet Orange Trees in the Amazonian

Gonçalves¹,

Carvalho²,

Garcia³

et al. 2019

JAS

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Accumulation of biomass and competition for nutrients can be used as parameters to identify species with higher potential for competition and, thus, with larger interference in crops. Consequently, studies addressing these parameters are important to weed science since they are the main factors that negatively affect the growth and productivity of cultivated plants. The objective of this research was to identify the species of weed plants with the largest potential of biomass production and accumulation of mineral nutrients in their leaves, which in turn, lead to higher interference in orange crops. In the floristic survey, 30 species of weed plants were identified and 14 botanic families, totaling 1341 sampled specimens. The phytosociological analysis showed, as per the importance value (IV), that the most representative weed species in the study area were as follows: Conyza bonariensis (L. (Cronquist)), Spermacoce latifolia Albl., Paspalum conjugatum PJ Bergius, Pueraria phaseoloides (Roxb.) Benth., Mollugo verticillate L., Peperomia pelucida (L.) Kunth, Euphorbia heterophylla L., Paspalum multicaule Poir and Waltheria corchorifolia Pers. Among these, the species with the highest production of biomass and accumulation of mineral nutrients in their tissues were S. latifolia, P. phaseoloides, P. conjugatum and C. bonariensis. This result suggests that these species are of high competitive potential against orange crops due to their high capacity for biomass and micronutrients accumulation.

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Section: Resultsmentioning

confidence: 99%

Biomass Production and Mineral Nutrient Accumulation by Weeds and Sweet Orange Trees in the Amazonian

Gonçalves¹,

Carvalho²,

Garcia³

et al. 2019

JAS

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“…Os resultados dessa pesquisa demonstram que o cultivo de crotalaria em áreas onde o patógeno já está presente pode ser responsável pelo aumento da população do fungo. MILEO et al (2006) estudaram a possibilidade de plantas utilizadas como cobertura de solo serem hospedeiras alternativas de Colletotrichum, encontrando o patógeno em C. striata. VASCONCELOS et al (1993) também isolaram Colletotrichum truncatum em crotalária.…”

Section: Resultados E Discussõesunclassified

“…como Colletotrichum truncatum (Andrus & Moore) (MILEO et al 2006); Phakpsora pachyrhizi (Sydow & P. Sydow) (FURLAN, 2004), Septoria crotalariae (MARINGONI et al2012 (PAULA JÚNIOR et al, 2011).…”

Section: Introductionunclassified

Crotalaria Como Hospedeira Alternativa E Fonte De Inóculo De Fungos Fitopatogênicos

Casagrande¹,

Crespo²,

Guimarães³

et al. 2016

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“…Outro efeito deletério das plantas daninhas na produtividade do guaranazeiro está associado à ação indireta, quando essas plantas hospedam microrganismos patogênicos para a cultura (Mileo et al, 2006). As plantas daninhas que ocupam extensas áreas tornam-se potenciais fontes de inóculo de fitopatógenos em cultivos comerciais, desempenhando papel fundamental na epidemiologia das doenças como hospedeiras secundárias (Chaves et al, 2003).…”

Section: Introductionunclassified

Plantas daninhas hospedeiras alternativas de Colletotrichum guaranicola em cultivos de guaraná no Estado do Amazonas

et al. 2007

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RESUMO -As plantas daninhas reduzem a produção de sementes de guaraná e podem hospedar microrganismos patogênicos, tornand o-se potenciais fontes de inóculo. Este trabalho identificou espécies de plantas daninhas colonizadas pelo fungo Colletotrichum guaranicola em cultivos de guaranazeiro em quatro municípios do Estado do Amazonas. As plantas danin has foram identificadas e a presença do fungo foi verificada por meio de isolamentos feitos a partir de fragmentos de folhas lesionadas. As espécies colonizadas por C. guaranicola foram Bidens bipinnata, Chloris sp., Clidemia capitellata, Cyperus flavus, Elephantopus scaber, Euphorbia brasiliensis, Hemidiodia sp., Hyptis lantanifolia, Paspalum conjugatum, Physalis angulata e Synedrella nodiflora, as quais podem representar uma fonte de inóculo do patógeno, além das plantas de guaraná. A diversidade de plantas daninhas, em cultivos de guaranazeiro, reforça a importância de estabelecer práticas de manejo dessas plantas, principalmente em Maués, onde ocorreu maior colonização das espécies de plantas daninhas pelo fungo.Palavras-chave: infestação, guaranazeiro, mancha foliar, hospedeira. ABSTRACT -Weed infestation may reduce grain guarana crops yield and host plant pathogens becoming potential inoculum sources. This research identified weed species colonized by the fungus

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Plantas de cobertura de solo como hospedeiras alternativas de Colletotrichum guaranicola

Cited by 9 publications

References 6 publications

Biomass Production and Mineral Nutrient Accumulation by Weeds and Sweet Orange Trees in the Amazonian

Biomass Production and Mineral Nutrient Accumulation by Weeds and Sweet Orange Trees in the Amazonian

Crotalaria Como Hospedeira Alternativa E Fonte De Inóculo De Fungos Fitopatogênicos

Plantas daninhas hospedeiras alternativas de Colletotrichum guaranicola em cultivos de guaraná no Estado do Amazonas

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