Epidemiology of wheat head blight and maize ear rot caused by<i>Fusarium graminearum</i>

Sutton, J.C.

doi:10.1080/07060668209501326

Cited by 691 publications

(532 citation statements)

References 68 publications

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“…Subsistence farmers report that finger millet is widely resistant to pathogens including Fusarium species 4,5 . One species, F. graminearum, causes devastating diseases in crops related to finger millet, including maize and wheat, associated with accumulation of the mycotoxin deoxynivalenol (DON), which affects humans and livestock 6,7 . Despite its prevalence across cereals, curiously, F. graminearum is not an important pathogen of finger millet 4,8 .…”

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Root-hair endophyte stacking in finger millet creates a physicochemical barrier to trap the fungal pathogen Fusarium graminearum

et al. 2016

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Root-hair endophyte stacking in finger millet creates a physicochemical barrier to trap the fungal pathogen Fusarium graminearum

et al. 2016

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“…Severe epidemics have been reported in Brazil in recent years which have resulted in considerable yield losses (Panisson et al, 2003). Typically, FHB is a floral disease infecting wheat during extrusion of anthers, although infections are also likely to occur from flowering to grain filling stages (Sutton, 1982;McMullen et al, 1997). Ascospores and macroconidia of the pathogen are produced on over-wintered residues, and either propagule may infect wheat under favorable weather conditions.…”

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confidence: 99%

Factors affecting density of airborne Gibberella zeae inoculum

2005

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Fusarium head blight (FHB) is a disease of increasing concern in the production of wheat (Triticum aestivum). This work studied some of the factors affecting the density of airborne Gibberella zeae inoculum. Spore samplers were placed at the edge of a field in order to observe spore deposition over a period of 45 days and nights in September and October, the period that coincides with wheat flowering. Gibberella zeae colonies were counted for each period and values transformed to relative density. A stepwise regression procedure was used to identify weather variables helpful in predicting spore cloud density. In general, a predominant night-time spore deposition was observed. Precipitation and daily mean relative humidity over 90% were the factors most hightly associated with peak events of spores in the air. Models for predicting spore cloud density simulated reasonably well with the fluctuation of airborne propagules during both night and day, with potential to be integrated into an FHB risk model framework.Additional keywords: Fusarium graminearum, aerobiology, spore dispersal, epidemiology. RESUMO Fatores que influenciam a densidade de inóculo aéreo de Gibberella zeaeA giberela, causada por Gibberella zeae, é uma das mais importantes doenças do trigo (Triticum aestivum). O presente trabalho objetivou estudar alguns aspectos que influenciam a densidade de inóculo aéreo. Armadilhas caça-esporos foram instaladas ao lado de parcelas experimentais de trigo com coletas realizadas durante o período da noite e do dia, por 45 dias nos meses de setembro a outubro, coincidindo com o florescimento do trigo. O número de colônias de G. zeae, avaliadas em cada período, foi transformado para valores relativos e correlacionado com variáveis ambientais. Uma análise de regressão foi utilizada para se identificar as variáveis climáticas úteis para a predição da densidade da nuvem de esporos. Foi observada uma predominância de deposição de inóculo aéreo no período da noite. Ocorrência de chuva e umidade relativa média diária superior a 90% estiveram fortemente associados com picos de concentração de inóculo aéreo. Os modelos simularam os incrementos na densidade da nuvem de esporos, apresentando potencial para serem integrados em um modelo de simulação do risco de giberela.Palavras-chave adicionais: Fusarium graminearum, aerobiolobia, dispersão de esporos, epidemiologia.

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“…Pintendre (34) Pintendre ( The two types of spores produced by F. graminearum, ascospores and macroconidia, can infect wheat plants and may be transported by wind. However, for infection of wheat heads, the principal réservoir of inoculum of F. graminearum is host débris (Sutton 1982). Since the émergence of wheat midge adultfemales from soil and the period of egg laying (heading and flowering) can overlap at a time when wheat is susceptible to infection by thefungus (anthesis) (Parry et al 1995), it is likely that thèse insects may serve as efficient vectors for F.…”

Section: Discussionmentioning

confidence: 99%

Occurrence of the orange wheat blossom midge [Diptera :Cecidomyiidae] in Quebec and its incidence on wheat grain microflora

Mongrain¹,

Couture²,

Dubuc

et al. 2005

phyto

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Samples of wheat spikes (Triticum aestivum) were collected in the summer of 1995 from different crop districts in Quebec and the occurrence of orange wheat blossom midge (Sitodiplosis mosellana) and seed microflora were determined. Estimated yield loss caused by wheat midge larvae averaged 6.3%. The percentage of infested spikes was significantly correlated with total seed contamination by fungi and bacteria (r = 0.79). The specific occurrence of Fusarium graminearum in grains was also significantly correlated with number of larvae per spike (r = 0.67) or per spikelet (r = 0.67). Consequently, the wheat midge might play a role in dissemination of F. graminearum.

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Epidemiology of wheat head blight and maize ear rot caused byFusarium graminearum

Cited by 691 publications

References 68 publications

Root-hair endophyte stacking in finger millet creates a physicochemical barrier to trap the fungal pathogen Fusarium graminearum

Root-hair endophyte stacking in finger millet creates a physicochemical barrier to trap the fungal pathogen Fusarium graminearum

Factors affecting density of airborne Gibberella zeae inoculum

Occurrence of the orange wheat blossom midge [Diptera :Cecidomyiidae] in Quebec and its incidence on wheat grain microflora

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