Fusarium oxysporum and Fusarium avenaceum associated with yield-decline of pyrethrum in Australia

Moslemi, Azin; Ades, Peter K.; Groom, T; Nicolas, Marc E.; Taylor, P. W. J.

doi:10.1007/s10658-017-1161-5

Cited by 8 publications

(22 citation statements)

References 42 publications

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“…Pyrethrum fields have been expected to yield for at least three consecutive years under ideal environmental conditions (Hay et al 2015). However, Pyrethrum yield decline was recently identified where plants failed to regrow after first harvest or yield reduction occurred after the second harvesting season (Moslemi et al 2017b).…”

Section: Introductionmentioning

confidence: 99%

“…Poor persistence or yield decline has no obvious single cause and has been attributed to interaction between various crown and root rot pathogens and abiotic stresses (Moslemi et al 2017b).…”

Section: Introductionmentioning

confidence: 99%

“…Plants affected by yield decline exhibited severe discolouration of crown tissues, reduced root growth and stunting (Moslemi et al 2017b). The fungal pathogens Fusarium oxysporum, Fusarium avenaceum and Paraphoma vinacea were found to be associated with these affected plants and affect plant growth (Moslemi et al 2016;Moslemi et al 2017b).…”

Section: Introductionmentioning

confidence: 99%

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Influence of waterlogging on growth of pyrethrum plants infected by the crown and root rot pathogens, Fusarium oxysporum, Fusarium avenaceum and Paraphoma vinacea

Moslemi

Ades

Groom

et al. 2018

Australasian Plant Pathol.

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Yield decline in pyrethrum fields of northern Tasmania was thought to be due to an interaction between soil-borne pathogens and abiotic stresses. Glasshouse trials were conducted to assess the influence of a 4-day waterlogging period on growth of pyrethrum plants already infected with the crown and root rot pathogens, Fusarium oxysporum, F. avenaceum and Paraphoma vinacea. In plants grown at optimum soil water capacity, F. oxysporum and P. vinacea significantly reduced the below-ground and total biomass of plants before waterlogging (0 bw = 2 months after inoculation, 2 2 mai), at 2 months after waterlogging (2 maw = 4 months after inoculation, 4 mai) and 6 months after waterlogging (6 maw = 8 months after inoculation, 8 mai) but had little effect on above-ground biomass. Although F. avenaceum was pathogenic it only had a significant effect on below-ground biomass at 4 and 8 mai. At 7 days after waterlogging treatment, plants infected with P. vinacea had more severe wilting, necrosis and chlorosis of the basal leaves and petioles than plants infected with the other two pathogens or non-infected plants. Significant interaction between pathogen treatments and waterlogging occurred at 2 maw, whereas at 6 maw plants had recovered and no significant interaction was observed between the pathogen treatments and waterlogging. The effect of waterlogging on below-ground dry weight of the plants infected with F. oxysporum and P. vinacea at 2 maw was more severe than those infected with F. avenaceum. There was no significant interaction between waterlogging and pathogens on photosynthesis 2 maw however, plants infected by each of the pathogens had the lowest photosynthesis rate in both waterlogged and the non-waterlogged treatments. At 6 maw the number of flowers, flower stems, petioles and leaves were significantly reduced by waterlogging however, there was no significant effect by pathogens nor an interaction between pathogens and waterlogging on these growth parameters. Overall, waterlogging exacerbated the effect of F. oxysporum, F. avenaceum and P. vinacea on below-ground dry weight and total biomass of the root-dip inoculated pyrethrum plants 2 maw and affected the flower and flower stem production.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of waterlogging on growth of pyrethrum plants infected by the crown and root rot pathogens, Fusarium oxysporum, Fusarium avenaceum and Paraphoma vinacea

Moslemi

Ades

Groom

et al. 2018

Australasian Plant Pathol.

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“…The flowers of perennial pyrethrum plants are harvested 2–3 times in a year by mechanical harvesting that separates the flower heads from the stems and then cuts the flower stems at the crown region, leaving the crop residues in the field (Moslemi et al ., ). Surveys conducted in 2015–16 at yield‐decline affected sites of pyrethrum in northern Tasmania reported necrotic leaf and crown tissues with fungal fruiting structures of different fungi including pycnidia of the ray blight pathogen in the crop residues (Moslemi et al ., ).…”

Section: Management Of Ray Blight In Pyrethrummentioning

confidence: 97%

“…However, over the last 10 years, poor regrowth of plants has occurred after the first harvest, leading to a severe yield decline. Plants affected by yield decline are severely discoloured, and may be infected by secondary pathogens such as Fusarium oxysporum , Fusarium avenaceum and Paraphoma vinacea (Moslemi et al ., , ).…”

Section: Introductionmentioning

confidence: 99%

Ray blight of pyrethrum in Australia: a review of the current status and future opportunities

2019

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Ray blight caused by Stagonosporopsis tanaceti is one of the most important diseases of pyrethrum (Tanacetum cinerariifolium), a perennial herbaceous plant cultivated for the extraction of insecticidal pyrethrins in Australia. The disease is responsible for complete yield loss in severe outbreaks. Infected seed is considered as the principal source of S. tanaceti. Infection hyphae remain only in the seed coat and not in the embryo, resulting in pre-and post-emergence death of seedlings and latent infection. Therefore, quantification of the level of infection by S. tanaceti within seed using a qPCR assay is important for efficient management of the disease. Stagonosporopsis tanaceti completes its life cycle within 12 days after leaf infection through production of pycnidia and can infect every tissue of the pyrethrum plant except the vascular and root tissues. Ray blight epidemics occur in pyrethrum fields through splash dispersal of pycnidiospores between adjacent plants. Besides steam sterilization, thiabendazole/thiram and fludioxonil are effective seed-treating chemicals in controlling S. tanaceti before planting begins. Ray blight is currently managed in the field through the foliar application of strobilurin fungicides in the first 1-2 years of crop establishment. Later on, difenoconazole and multisite specific fungicides in the next 2-3 years during early spring successfully reduce ray blight infestation. Avoiding development of resistance to fungicides will require more sustainable management of ray blight including the development and deployment of resistant cultivars.

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The biocontrol of potato dry rot by microorganisms and bioactive substances: A review

Xia²,

Zhao³

et al. 2022

Physiological and Molecular Plant Pathology

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Fusarium oxysporum and Fusarium avenaceum associated with yield-decline of pyrethrum in Australia

Cited by 8 publications

References 42 publications

Influence of waterlogging on growth of pyrethrum plants infected by the crown and root rot pathogens, Fusarium oxysporum, Fusarium avenaceum and Paraphoma vinacea

Influence of waterlogging on growth of pyrethrum plants infected by the crown and root rot pathogens, Fusarium oxysporum, Fusarium avenaceum and Paraphoma vinacea

Ray blight of pyrethrum in Australia: a review of the current status and future opportunities

The biocontrol of potato dry rot by microorganisms and bioactive substances: A review

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