Management of fusarium basal rot (Fusarium oxysporum f. sp. cepae) on shallot through fungicidal bulb treatment

Sintayehu, Assefa; Sakhuja, P. K.; Fininsa, Chemeda; Ahmed, Seid

doi:10.1016/j.cropro.2010.12.027

Cited by 32 publications

(27 citation statements)

References 13 publications

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“…Wiyatiningsih et al (2009) recounted that FOCe infection in shallot could reduce 50% of the yields in susceptible cultivars. Whereas Sintayehu et al (2011) reported that Fusarium basal rot caused 45% loss in yield. Similarly, in Japan, during summer period, more than 50% loss happened in welsh onion due to Fusarium basal rot (Dissanayake et al, 2009).…”

Section: Resultsmentioning

confidence: 99%

“…The leaf twisting was scored and categorized into the followings, score 0 = 0% severity (no leaf twisting), score 1 = 1-10% leaf twisting, score 2 = 11-30% leaf twisting, score 3 = 31-75% leaf twisting and score 4 = ≥ 76% leaf twisting. The determination of basal rot disease severity was conducted based on the scoring system used by Sintayehu et al (2011) with modification, as follows, score 0 = no rotting, score 1 = 10% rotting root, score 2 = 10-30% rotting root with 10% rotting bulbs, score 3 = 100% rotting root with 10-30% rotting bulbs and score 4 = 100% rotting root with > 30% rotting bulbs. The levels of plant resistance were determined based on the scale of diseases severity used by Esfahani et al (2012) with a slight modification, including resistant (0-10%), moderately resistant (11-25%), moderate (26-50%), moderately susceptible (51-75%) and susceptible (76-100%).…”

Section: Methodsmentioning

confidence: 99%

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Yields Losses Caused by Basal Plate Rot (Fusarium oxysporum f.sp. cepae) in Some Shallot Varieties

Hadiwiyono

Sari

Poromarto

2020

Caraka Tani J. Sustain. Agric.

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Basal plate rot or moler caused by <em>Fusarium oxysporum</em> f. sp. <em>cepae</em> (FOCe) is the most important disease of shallot. However, the information of crop losses attributed to the pathogen is still limited, especially related to resistance of shallot. This paper discusses the correlation between disease severity and resistance of some shallot varieties to yield losses. The experiment was arranged by Completely Randomized Design (CRD) with six varieties of shallot as treatments, each of which consisted of 20 shallots, with three times of replications. The independent variables were the disease severity of twisting leaf and rotting of shallot bulb. The association of disease severity versus yield losses in different varieties was based on the correlation analysis. The results showed that both variables were positively correlated to yield losses, which were significantly affected by the level of resistance. Yield losses in resistant and moderate varieties were at the ranges of 2.13-4.38 and 15, 27.26-40.04, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Yields Losses Caused by Basal Plate Rot (Fusarium oxysporum f.sp. cepae) in Some Shallot Varieties

Hadiwiyono

Sari

Poromarto

2020

Caraka Tani J. Sustain. Agric.

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“…Bulb rot pathogens accumulate differently with F. przewalskii growth Bulb or root rot are soil-borne diseases and major causes of the yield and quality loss of the liliaceous onion and shallot [24], garlic [25], also loss for rhizomes medicinal plants [8,9]. Although surviving in soil for a long time, the species and quantity of rot pathogens are affected by climate, succession of soil types, and biological factors [9,26].…”

Section: Discussionmentioning

confidence: 99%

Pathogenicity of fungus strains isolated from medicinal Fritillaria przewalskii Maxim. bulb rot

Chen

Guo

et al. 2020

Preprint

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Background: Bulb rot causes loss of the perennial medicinal plant Fritillaria przewalskii Maxim., is exacerbated with growth years and seriously constrains plant productivity, but the pathogens responsible for the disease were still unknown, very few reports were presented before.Methods: To determine potential pathogenic sources, fungus strains were isolated from diseased plant samples with bulb rot symptom of the 3- to 5-year-old F. przewalskii plants by tissue separation, and assayed for pathogenicity according to Koch’s Law.Results: Seven pathogenic strains (F1-F7) were detected in5-year-old rot bulbs, six (F1-F6) in 4-year-old rot bulbs, and four (F1, F2, F5, F6) in 3-year-old rot bulbs. All of the strains were able to infect bulbs by stabbing and some exhibited varying levels of aggressiveness. Relative to the non-stabbing controls, the bulbs stab-inoculated with F5, F2, F7, F4, F1, F6, and F3 showed 76.65%, 75.15%, 71.44%, 40.37%, 39.09%, 36.87%, and 34.93% rot after 8 days, respectively. Phylogenetic analysis revealed that theses trains (deposited in GenBank under accessions MH917682 to MH917688) were clustered into Bionectria ochroleuca (F1, F3, F4), Fusarium oxysporum (F2, F7), Fusarium tricinctum (F5), and Clonostachys rosea (F6). The two species of Fusarium had the strongest pathogenicity, followed by Bionectria ochroleuca and Clonostachys rosea. Although leading to low bulb rot incidence by stab-inoculation, F1 showed the highest isolation rate (48.9%) among all strains. Conclusions: Thus, the edible and medicinal bulbs of F. przewalskii are susceptible to synergetic contamination by these seven pathogenic strains at some point after their third year of growth, which has contributed to the species endangered status, with the two strains of Fusarium being the predominant pathogens. To our knowledge, this is the first report on the seven strains of four fungal species causing in F. przewalskii bulb rot in China.

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“…Therefore, F5 strain was, in fact, F. tricinctum. The sequences of F1, Bulb or root rot are all soil-borne disease, a major cause of the yield and quality loss for liliaceous onion and shallot (Sintayehu et al, 2010), garlic (Gálvez et al, 2017), also loss for rhizomes medicinal plants (Chen et al, 2011;Liu et al, 2011). Although survived in soil for a long time, the pathogen species and quantity are influenced by climate, succession of soil types and biological factors (Chen et al, 2011;Mandeel, 2006).…”

Section: Molecular Biology Identificationmentioning

confidence: 99%

Pathogenic analyses of fungus strains isolated from medicinal Fritillaria przewalskii Maxim. bulb rot

Chen

Guo

et al. 2020

Journal of Phytopathology

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Bulb rot causes a great loss of rare perennial medicinal Fritillaria przewalskii Maxim., which is exacerbated with growth year and seriously constrains the plant productivity, but the pathogens responsible for the disease were still unknown. In this paper, we attempted to explore the potential pathogens leading to bulb rotting and their occurrence patterns in artificial domesticated F. przewalskii. Fungus strains were isolated from the bulb rot spot of the 3‐ to 5‐year‐old diseased F. przewalskii plants by tissue separation, further assayed for pathogenicity according to Koch's law and finally identified by both morphological and molecular methods. Seven pathogenic strains (F1‐F7) were detected in 5‐year‐old rot bulbs, six (F1‐F6) in 4‐year‐old rot bulbs and four (F1, F2, F5, F6) in 3‐year‐old rot bulbs. All of the strains were able to infect bulbs by stabbing and some exhibited varying levels of aggressiveness. Relative to the non‐stabbing controls, the bulbs stab‐inoculated with F5, F2, F7, F4, F1, F6, and F3 showed 76.65%, 75.15%, 71.44%, 40.37%, 39.09%, 36.87%, and 34.93% rot after 8 days, respectively. Phylogenetic analysis revealed that these seven strains were clustered into Bionectria ochroleuca (F1, F3, F4), Fusarium oxysporum (F2, F7), Fusarium tricinctum (F5), and Clonostachys rosea (F6). The two species of Fusarium had the strongest pathogenicity, followed by Bionectria ochroleuca and Clonostachys rosea. Although leading to low bulb rot incidence by stab inoculation, F1 showed the highest isolation rate (48.9%) among all strains. Thus, the edible and medicinal bulbs of F. przewalskii are susceptible to synergetic contamination by these seven pathogens at some point after their third year of growth, which has contributed to the species endangered status, with the two strains of Fusarium being the predominant pathogens. To our knowledge, this is the first report on the seven strains of four fungal species causing F. przewalskii bulb rot in China.

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Management of fusarium basal rot (Fusarium oxysporum f. sp. cepae) on shallot through fungicidal bulb treatment

Cited by 32 publications

References 13 publications

Yields Losses Caused by Basal Plate Rot (Fusarium oxysporum f.sp. cepae) in Some Shallot Varieties

Yields Losses Caused by Basal Plate Rot (Fusarium oxysporum f.sp. cepae) in Some Shallot Varieties

Pathogenicity of fungus strains isolated from medicinal Fritillaria przewalskii Maxim. bulb rot

Pathogenic analyses of fungus strains isolated from medicinal Fritillaria przewalskii Maxim. bulb rot

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