Weed hosts of<i>Fusarium oxysporum</i>f. sp.<i>cubense</i>tropical race 4 in northern Australia

Hennessy, C. M. R.; Walduck, G; Daly, A.; Padovan, Anna

doi:10.1071/ap04091

Cited by 68 publications

(74 citation statements)

References 5 publications

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“…Chlamydospores of Foc in dead host material play a role in its survival, but its persistence for long periods is probably due to its ability to infect non-host weed species. In studies in tropical America and Australia, Foc was isolated from the roots of diverse grasses and other weed species in banana plantations that were affected by race 1 and TR 4 (Hennessy et al, 2005;Waite and Dunlap, 1953). The ability of Foc to survive in the absence of its banana host is a significant factor in the management of this disease.…”

Section: Epidemiologymentioning

confidence: 98%

Management of Fusarium wilt of banana: A review with special reference to tropical race 4

2015

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Section: Epidemiologymentioning

confidence: 98%

Management of Fusarium wilt of banana: A review with special reference to tropical race 4

2015

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“…Reports of 20 years are common (Stover 1962), and in extreme cases 40 years have been indicated (Simmonds 1966;Buddenhagen 2009). Stover (1962) suggested that resilient chlamydospores of Foc were responsible for its longevity, but its survival as a non-pathogenic parasite of weed roots (Hennessy et al 2005;Waite & Dunlap 1953) is probably more important for long-term survival in the absence of its banana host (Ploetz 2015).…”

Section: Distribution and Epidemiologymentioning

confidence: 98%

Tropical race 4 of Panama disease in the Middle East

et al. 2015

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Background Panama disease (aka Fusarium wilt) of banana (Musa spp.) has been a destructive problem for well over a century. Race 1 of the pathogen, Fusarium oxysporum f. sp. cubense (Foc), was responsible for the demise of the first export trades of banana that were based on the cultivar 'Gros Michel'. Currently, tropical race 4 (TR4) impacts the Cavendish cultivars, which are most important in both export and smallholder production. TR4 was confirmed in Jordan in 2013, but has probably been present in the country since at least 2005.

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“…Foc can survive as a saprophyte on dead and decaying organic matter and has been reported surviving asymptomatically in the living roots of several diverse genera including Paspalum, Panicum, Ixophorus, Commelina, Chloris, Euphorbia, Tridax and Cyanthilium (Jeger et al, 1995;Waite and Dunlap, 1953;Hennessy et al, 2005). Nonpathogenic or endophytic strains of F. oxysporum (Fo) that colonise plants, but cause no symptoms, have also been described (Lievens et al, 2008;Lemanceau and Alabouvette, 1991).…”

Section: Fusarium Wiltmentioning

confidence: 99%

“…Fungicidal pseudostem injections have given erratic results (Ploetz and Pegg, 2000). Good quarantine practices like rapid destruction of infected plants and strict import quarantine can slow the spread of Foc (Hennessy et al, 2005). Laws prohibiting the unauthorised spread of banana material have impeded the spread of Foc within Australia (Pegg et al, 1996).…”

Section: Fusarium Wiltmentioning

confidence: 99%

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Silicon in banana plants: uptake, distribution and interaction with the disease fusarium wilt

Jones¹

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Banana cultivation worldwide is under threat from a wide variety of pathogens and negative environmental factors. Most cultivated banana plants are vegetatively propagated, resulting in a dearth of breeding and a genetic bottleneck. This has led to enhanced susceptibility to a number of lethal plant diseases. Novel solutions are being pursued to enhance the innate defences of the banana plant in an effort to combat these diseases.Of all current banana diseases, Fusarium wilt poses the greatest overall threat. Fusarium wilt, sometimes known as Panama disease, is caused by the soilborne fungus Fusarium oxysporum f. sp. cubense (Foc). A complex grouping of polyphyletic fungal strains, collectively referred to as races, is responsible for causing disease in banana. Race 1 of Foc caused the collapse of the global 'Gros Michel' trade industry in the mid-20th century.The industry recovered by substituting 'Cavendish' cultivars for 'Gros Michel', but a new race (race 4) is now threatening 'Cavendish' production.Breeding and transgenics programmes for developing Foc resistant banana cultivars are in progress, but advancement is slow and durable resistance cannot be guaranteed. In the interim, innovative control strategies for Foc are being sought. These strategies involve the development of new cultural controls or soil amendments and are intended to inhibit fungal inoculum in the soil or to upregulate innate plant defences. The research in this thesis focusses on the poorly studied plant nutrient, silicon, and its potential for controlling fusarium wilt of banana.Silicon is classified as a "quasi-essential" element: not fulfilling the strict requirements for essentiality, but still playing an active role in the plant. Despite its prevalence in the environment and content within plants, it remains one of the least studied and understood plant nutrients. Adding silicon to plants as a fertiliser makes them more tolerant to various biotic (pathogens) and abiotic (environmental) factors. This protective effect is not consistent between species and can vary within species. The mechanism by which silicon enhances innate plant defences is poorly understood. Anecdotal reports of silicon iii improving banana tolerance to both pathogens and environmental factors have been reported and subsequently investigated in the scientific literature.For this thesis, the research objectives were to investigate the location and deposition of silicon within roots and shoots of banana plants; investigate silicon absorption through the roots and uptake dynamics; to determine if silicon enhances tolerance to Foc; observe the beneficial effects of silicon in the tissue culture phase of banana cultivation, and; examine how soil distribution of silicon influences uptake and resistance to Foc. All research took place on the 'Cavendish' "Williams" cultivar and subtropical race 4 of Foc as these are most relevant for Australian banana production.The location of silicon in the roots of banana plants was determined using scanning electron microsco...

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Weed hosts ofFusarium oxysporumf. sp.cubensetropical race 4 in northern Australia

Cited by 68 publications

References 5 publications

Management of Fusarium wilt of banana: A review with special reference to tropical race 4

Management of Fusarium wilt of banana: A review with special reference to tropical race 4

Tropical race 4 of Panama disease in the Middle East

Silicon in banana plants: uptake, distribution and interaction with the disease fusarium wilt

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