Early colonization of the ears of wheat and barley by<i>Fusarium poae</i>

Sturz, A. V.; Johnston, H. W.

doi:10.1080/07060668309501636

Cited by 20 publications

(6 citation statements)

References 16 publications

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“…Inoculation experiments have shown F. graminearum and F. culmorum to cause much more severe FHB than other species isolated from blighted grains (Stack & McMullen 1985;Wilcoxson et al 1988). Sturz & Johnston (1983) identified F. poae, and to a lesser extent F. avenaceum, as early colonisers of wheat ears in Canada, although they were not believed to be the primary cause of FHB. It was thought, however, that early infection by these species may have predisposed ears to later infection by the primary FHB pathogens, F. graminearum and F. culmorum.…”

Section: Discussionmentioning

confidence: 99%

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Cultivar and crop management influences on fusarium head blight and mycotoxins in spring wheat(Triticum aestivum)in New Zealand

Cromey¹,

Shorter

Lauren

et al. 2002

New Zealand Journal of Crop and Horticultural Science

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Cultivar and crop management influences on fusarium head blight (FHB) of wheat (Triticum aestivum L.) were investigated in cultivar field trials and commercial wheat crops in the North Island of New Zealand over two growing seasons. There were consistent differences between cultivars in their susceptibility to FHB. The Chinese wheat 'Nanjing' had the lowest level of FHB, mycotoxins, and Fusarium infection in grain. Although no New Zealand cultivars approached an equivalent level of resistance, FHB in some cultivars was low in most situations, and these cultivars had a useful level of resistance. FHB and mycotoxin levels varied widely between crops surveyed. Two Fusarium mycotoxins, deoxynivalenol (DON) and nivalenol (NIV), were detected in grain samples from crops and trials. Overall, DON levels were higher than NIV in crops in both years. FHB incidence and levels of Fusarium infection and mycotoxins in grain were closely H02022;

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Section: Discussionmentioning

confidence: 99%

“…It is possible that movement ofF. avenaceum and F. poae into grains following their early colonisation of ears (Sturz & Johnston 1983) is hindered by later colonisation by F. graminearum.…”

Section: Discussionmentioning

confidence: 99%

Cultivar and crop management influences on fusarium head blight and mycotoxins in spring wheat(Triticum aestivum)in New Zealand

Cromey¹,

Shorter

Lauren

et al. 2002

New Zealand Journal of Crop and Horticultural Science

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“…avenaceum, F. sporotrichioides, and F. poae also were isolated from barley kernels collected in the survey, but in much lower frequencies than F. graminearum (Table 2). These three species previously have been isolated from barley kernels (2,8,9,13,18,34,35), the crowns and subcrown internodes of spring wheat (26), and blighted wheat spikes (12,13,39) in North America. F. avenaceum previously was isolated in grassland soil (21) in North Dakota.…”

Section: Discussionmentioning

confidence: 99%

Fusarium Species Pathogenic to Barley and Their Associated Mycotoxins

Salas¹,

Steffenson²,

Casper³

et al. 1999

Plant Disease

121

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Epidemics of Fusarium head blight (FHB) occurred on barley in Minnesota, North Dakota, and South Dakota from 1993 to 1998. The Red River Valley region was most severely impacted by the disease based on assessments of FHB severity in grain samples harvested from commercial fields. Fusarium graminearum was the primary pathogen causing these FHB epidemics. It comprised from 62 to 64% of all Fusarium species isolated from infected kernels from 1994 to 1996. Fusarium poae (range of isolation 13 to 20%),F. sporotrichioides (10 to 17%), and F. avenaceum (6 to 10%) also were isolated from barley kernels and were likely involved in causing some FHB infection, but to a very limited extent. All four Fusarium species were pathogenic on barley in inoculation tests conducted in both the greenhouse and the field. Mycotoxin screens were performed on barley spikes inoculated with the respective species in the greenhouse. Spikes infected with F. graminearum contained deoxynivalenol and 15-acetyldeoxyni-valenol; those infected with F. sporotrichioides contained T-2 toxin, HT-2 toxin, and T-2 tetraol; and those infected with F. poae contained nivalenol. Some isolates of F. poae also produced 15-acetoxyscirpenol and scirpentriol. Although F. graminearum and DON are recognized as the primary FHB pathogen and mycotoxin, respectively, in barley, the possible presence of other Fusarium species and mycotoxins should not be overlooked.

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“…Our finding that F. langsethiae can infest oats panicles already during heading is in line with observations from field surveys: F. langsethiae have been observed in oat panicles in naturally infected fields at head emergence (Opoku et al, 2013;Parikka et al, 2007). Sturz and Johnston (1983) observed two culture variants of Fusarium poae in barley and wheat flag leaf sheets collected during booting, where the most frequently encountered variant often had a powdery appearance and probably was F. langsethiae. The authors considered these fungi to be primary colonizers of cereals.…”

Section: Effect Of Growth Stage At Inoculation On the Level Of F Lang...mentioning

confidence: 96%

Fusarium langsethiae and mycotoxin contamination in oat grain differed with growth stage at inoculation

et al. 2022

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High levels of mycotoxins are occasionally observed in Norwegian oat grain lots. Mycotoxins of primary concern in Norwegian oats are deoxynivalenol (DON) produced by Fusarium graminearum and HT2- and T2-toxins (HT2 + T2) produced by Fusarium langsethiae. Improved understanding of the epidemiology of Fusarium spp. is important for the development of measures to control mycotoxins. We studied the susceptibility to F. langsethiae after inoculation at early (booting, heading, flowering) or late (flowering, milk, dough) growth stages in three oat varieties in greenhouse experiments. The varieties had previously shown different levels of resistance to F. graminearum: Odal, Vinger (both moderately resistant), and Belinda (susceptible). The level of F. langsethiae DNA and HT2 + T2 were measured in harvested grain. In addition, we observed differences in aggressiveness (measured as the level of F. langsethiae DNA in grain) between F. langsethiae isolates after inoculation of oats at flowering. Substantial levels of F. langsethiae DNA (mean ≥ 138 pg per μg plant DNA) and HT2 + T2 (≥348 μg/kg) were detected in grain harvested from oats that were spray-inoculated at heading or later stages, but not at booting (mean ≤ 10 pg/μg and ≤ 25 μg/kg, respectively), suggesting that oats are susceptible to F. langsethiae from heading and onwards. Vinger was the most resistant variety to F. langsethiae/HT2 + T2, whereas Odal and Belinda were relatively susceptible. We observed that late inoculations yielded high levels of other trichothecene A metabolites (mean sum of metabolites of 35–1048 μg/kg) in addition to HT2 + T2, in harvested grain, an indication that infections close to harvest may pose a further risk to food and feed safety.

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Early colonization of the ears of wheat and barley byFusarium poae

Cited by 20 publications

References 16 publications

Cultivar and crop management influences on fusarium head blight and mycotoxins in spring wheat(Triticum aestivum)in New Zealand

Cultivar and crop management influences on fusarium head blight and mycotoxins in spring wheat(Triticum aestivum)in New Zealand

Fusarium Species Pathogenic to Barley and Their Associated Mycotoxins

Fusarium langsethiae and mycotoxin contamination in oat grain differed with growth stage at inoculation

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