Seedling infection assay for resistance to &lt;i&gt;Sclerotium cepivorum&lt;/i&gt; in &lt;i&gt;Allium&lt;/i&gt; species

Hunger, Sarah A.; McLean, K. L.; Eady, Colin; Stewart, Alison

doi:10.30843/nzpp.2002.55.3993

Cited by 6 publications

(4 citation statements)

References 11 publications

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“…This assay was similar to the one described by Hunger et al (2002) for testing resistance to Sclerotium cepivorum in Allium species.…”

Section: Methodsmentioning

confidence: 93%

Evaluation of the susceptibility of various grass species to Gaeumannomyces graminis var tritici

Chng¹,

Cromey²,

Butler³

2005

NZPP

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Takeall caused by the soilborne pathogen Gaeumannomyces graminis var tritici (Ggt) is a devastating root disease of wheat As well as infected host residues from previous wheat crops grass crop or weed species also play an important role in the carryover of inoculum to the next wheat crop However the survival and spread of inoculum on different grasses differs considerably depending on their susceptibility to the pathogen Using Triticum aestivum (wheat) and Avena sativa (oat) as susceptible and resistant standards the susceptibility to Ggt of 24 grass species commonly found within wheat crops in New Zealand was examined in a simple laboratory assay Of all the grass species evaluated 83 were susceptible to Ggt with Bromus diandrus Bromus willdenowii Bromus inermis and Pennisetum clandestinum being highly susceptible while Cynosurus cristatus Cynodon dactylon and Paspalum dilatatum were highly resistant to the pathogen

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“…This assay was similar to the one described by Hunger et al (2002) for testing resistance to Sclerotium cepivorum in Allium species.…”

Section: Methodsmentioning

confidence: 93%

Evaluation of the susceptibility of various grass species to Gaeumannomyces graminis var tritici

Chng¹,

Cromey²,

Butler³

2005

NZPP

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“…White rot disease caused by the soil borne fungus Stromatinia cepivora (Berk.) Whetzel is a serious threat to onions and garlic worldwide and is a major limiting factor in the production of both crops in Egypt (Hunger et al., 2002; Metcalf et al., 2004; Elshahawy et al., 2017a,b,c; Elshahawy et al., 2018a,b). The first reference of white rot in Egypt was in 1922.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Stromatinia cepivora inocula and control of white rot disease in onion and garlic crops by repeated soil applications with sclerotial germination stimulants

Elshahawy

Morsy

Abd-El-Kareem

et al. 2019

Heliyon

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The effect of soil-applied Allium crop products on the Stromatinia cepivora viability and the incidence of white rot in subsequent onion and garlic crops were evaluated in this work. The tested products were onion powder, garlic powder, onion oil, garlic oil and Allium waste (onion and garlic) that are described as sclerotial germination stimulants. Under in vitro conditions, data revealed that more than 80% of the sclerotia died in the soil treated with sclerotial germination stimulants. Under greenhouse conditions, soil-artificially infested with sclerotia of S. cepivora and treated with sclerotial germination stimulants for 6-months before cultivation, significantly reduced the incidence of white rot on onion and garlic. Onion oil, garlic oil and Allium waste were the most effective treatments, decreasing disease incidence by 78.6% in onion and 80.0% in garlic. Under field conditions, sclerotial germination stimulants were incorporated into the soil in commercial fields naturally infested with S. cepivora. Two fields were chosen based on differential sclerotial density. Within 6 months after treatment, more than 70% of the sclerotia died in the plots treated with sclerotial germination stimulants. In subsequent onion and garlic crops planted approximately one year after soil treatment, sclerotial germination stimulants were more effective than the control in reducing white rot symptoms coupled with low inoculum density (45.9 sclerotia/kg of soil). Reduction of white rot disease was accompanied by increased of growth and bulbs yield of onion and garlic plants. Despite the efficacy of sclerotial germination stimulants to reduce populations of viable sclerotia in soil with a high inoculum density (594.7 sclerotia/kg of soil), the pathogen caused substantial white rot and yield losses in subsequent onion and garlic crops planted approximately one year after soil treatment.

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“…Box 37, Ambo, Ethiopia, Tel: +251-(0)911-044929, Fax: +251-(0)112362325; E-mail: tarikuh2012@gmail.com, tarikuh2002@yahoo.com of all possible combinations with the objective to achieve integrated management of garlic white rot using four Trichoderma spp of PPRC isolates and two recommended fungicides [Apron Star 42 WS and Tebuconazole (Folicur 250 EC] under greenhouse condition. The Sclerotium cepivorum sclerotia propagules were maintained and undertaken in pot experiment (Seedling bioassay), as described earlier by [23,29]. Inoculated local garlic clove with S. cepivorum and un-inoculated alone were used as positive and absolute control, respectively.…”

Section: Introductionmentioning

confidence: 99%

Integrated Management of Garli c White Rot (Sclerotium cepivorum Berk)Using Some Fungicides and Antifungal Trichoderma Species

Dilbo¹

2015

J Plant Pathol Microbiol

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White rot (Sclerotium cepivorum Berk), is one of the most destructive soil borne pathogens that pose significant threat to production of garlic and other Allium species in Ethiopia and all over the world. Since most of the conventional control methods are not effective, the development of eco-friendly and cost effective integrated management method is critically required. A study was then conducted with completely randomized design and three replications that consist of all possible combinations of 31 treatments. The study was conducted during 2013/14 under greenhouse condition with the objective of evaluating the effect of two fungicides, Apron Star 42 WS and Tebuconazole, and in combination with four Trichoderma species namely T. hamatum, T. harzianum, T. oblongisporum and T. viride. The results of this study revealed that the efficacy of both fungicides, when tested alone, against S. cepivorum was lower than those treated with Trichoderma spp. alone and the fungicide combined treatments. Among all treatments, T16 (Apron Star 42 WS fungicide combined with T. hamatum and T. viride) has provided the best antagonistic activity against S. cepivorum with no disease incidence, followed by T. viride (T8) alone and Tebuconazole combined with T. hamtum (T21) (both 11.1% incidence). This was well correlated to the level of foliar, stem base and bulb rots symptoms as well as to plant growth and biomass of garlic plant parts. The results suggested that integration of fungicides and Trichoderma species is better than applying them alone, which could be attributed to the synergistic and additive growth promoting effects of combined treatments besides controlling the disease. This integrated approach appears to be the first report in Ethiopia, which has never been tested before.

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Seedling infection assay for resistance to <i>Sclerotium cepivorum</i> in <i>Allium</i> species

Cited by 6 publications

References 11 publications

Evaluation of the susceptibility of various grass species to <i>Gaeumannomyces graminis</i> var <i>tritici</i>

Evaluation of the susceptibility of various grass species to <i>Gaeumannomyces graminis</i> var <i>tritici</i>

Reduction of Stromatinia cepivora inocula and control of white rot disease in onion and garlic crops by repeated soil applications with sclerotial germination stimulants

Integrated Management of Garli c White Rot (Sclerotium cepivorum Berk)Using Some Fungicides and Antifungal Trichoderma Species

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