Assessment of Irish Potato Cultivars’ Field Tolerance to Bacterial wilt (Ralstonia solanacearum) in Kenya

Rotich, Felix; Onyango, Ochuodho Julius; Eliazer, O. M.

doi:10.3923/ppj.2010.122.128

Cited by 12 publications

(15 citation statements)

References 7 publications

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“…In line with our finding, Felix et al. () reported to have registered high bacterial wilt incidence as well as frequency of latent infection of tubers in the experimental fields at Nairobi (1737 masl) and Kitale (1890 masl). Moreover, correlation analysis we computed for Felix et al.…”

Section: Discussionsupporting

confidence: 93%

“…Furthermore, at the highlands, even the wilt incidences of a given cultivar are not necessarily consistent over a number of years (Felix et al. ), the same is the resistance reaction of a crop that has been declared to be ‘resistant’ or ‘susceptible’ solely based on degree of wilt incidence. For instance, Cruza‐148 (CIP‐720118) was used as a resistant control by Priou et al.…”

Section: Discussionmentioning

confidence: 99%

“…However, Felix et al. () reported that latent infection is relatively stable regardless of environmental variation as opposed to the highly variable and temperature/altitude dependent wilt incidence. Moreover, Swanson et al.…”

Section: Discussionmentioning

confidence: 99%

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Understanding Reaction of Potato (Solanum tuberosum) to Ralstonia solanacearum and Relationship of Wilt Incidence to Latent Infection

Aliye

Dilbo

Pillay

2014

Journal of Phytopathology

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Bacterial wilt caused by Ralstonia solanacearum is one of the most important diseases affecting more than 200 plant species, including solanaceous crops. The pathogen is known to cause complicated symptoms ranging from visible to latent ones. Understanding crop's reaction to the pathogen and the underlying relatedness of latent infection to wilt incidence is of paramount importance. Thus, a number of potato cultivars including improved and otherwise were evaluated under greenhouse and field conditions. Accordingly, twenty-eight of the cultivars tested under greenhouse conditions were resistant to the pathogen with scores ranging from 0.77 to 1.17 of 5. Nonetheless, under field conditions, only 2 of 28 cultivars found to be 'resistant' under greenhouse conditions, showed adequate resistance to the pathogen, indicating the significant impact of environment on the activity of the pathogen and reaction of the crop. Percentage wilt incidence and latent infection showed significant (P < 0.05) positive correlation, with r = 0.9438. Thus, evaluation of crop's performance based on the combination of the parameters like field wilt incidence and proportion of latent infection gave us better picture of the overall crop feat, than using wilt incidence as a sole parameter of evaluation as has been the case in most studies. Moreover, the established correlation of latent infection with field wilt incidence will also help us understand the disease epidemiology and design effective management measures, accordingly.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

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Understanding Reaction of Potato (Solanum tuberosum) to Ralstonia solanacearum and Relationship of Wilt Incidence to Latent Infection

Aliye

Dilbo

Pillay

2014

Journal of Phytopathology

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“…Previously, varieties Kenya Dhamana (CIP-800228), Kenya Sifa, Kenya Karibu, Mauritius clone (89016), and Cruza-148 (CIP-720118) were rated as resistant to bacterial wilt, while varieties Asante (CIP-381381.20), Tigoni (CIP-381381.13), Nyayo, and Dutch Robyjin were highly susceptible (Ateka et al 2001). In a later study it was found that Kenya Sifa and Kenya Karibu were the most resistant to bacterial wilt while Dutch Robjyn and Tigoni were the most susceptible (Felix et al 2010). The present study found Kenya Karibu to be the most resistant followed by Kenya Sifa while Ingabire was third.…”

Section: Discussionmentioning

confidence: 98%

Response of Potato Genotypes to Bacterial Wilt Caused by Ralstonia Solanacearum (Smith)(Yabuuchi et al.) In the Tropical Highlands

et al. 2013

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“…However, their reaction to infection varied significantly with different times to symptom expression and to complete wilting, AUDPC, as well as variation in number and weight of tubers produced. Different susceptibility levels in potato cultivars to bacterial wilt have previously been shown in Kenya (Ateka et al , ; Felix et al , ; Muthoni et al , ). The present study found cultivar Cruza to be the most tolerant followed by CIP‐58 and Kinigi.…”

Section: Discussionmentioning

confidence: 87%

Ralstonia solanacearum causing potato bacterial wilt: host range and cultivars’ susceptibility in Rwanda

et al. 2020

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Members of the Ralstonia solanacearum species complex (RSSC), causing potato bacterial wilt or brown rot, are highly contagious and there are no known cultivars with durable resistance to the pathogen. This study hypothesized (a) that crops intercropped or rotated with potato, plants in the same family, and plants grown in the neighbouring fields can host the pathogen and they can be potential sources of primary inoculum, and (b) that potato cultivars currently multiplied by the public tissue culture laboratory in Rwanda are less susceptible to the pathogen. Fourteen plant species and potato, and nine potato cultivars were tested for susceptibility to an RSSC phylotype II strain under greenhouse conditions. The bacteria induced symptoms on potato, tomato, tree tomato, sweet pepper, and eggplant only. Among the plant species with symptoms, potato, tomato, and tree tomato wilted completely. There was a significant difference in days to symptom expression and to complete wilting (p < .0001). While all tested potato cultivars were found to be susceptible, the number of days to first symptom expression, days to complete wilting, area under the disease progress curve (AUDPC), and the number and weight of harvested tubers varied considerably. Cultivars Cruza, Kinigi, and CIP‐58 were less susceptible whereas the cultivars Gikungu, Kirundo, and Victoria were highly susceptible. There is a strong need to search for other sources of resistance. The results indicate that some plant species that might serve as a reservoir of the bacterium should be avoided in the vicinity of potato crops.

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Assessment of Irish Potato Cultivars’ Field Tolerance to Bacterial wilt (Ralstonia solanacearum) in Kenya

Cited by 12 publications

References 7 publications

Understanding Reaction of Potato (Solanum tuberosum) to Ralstonia solanacearum and Relationship of Wilt Incidence to Latent Infection

Understanding Reaction of Potato (Solanum tuberosum) to Ralstonia solanacearum and Relationship of Wilt Incidence to Latent Infection

Response of Potato Genotypes to Bacterial Wilt Caused by Ralstonia Solanacearum (Smith)(Yabuuchi et al.) In the Tropical Highlands

Ralstonia solanacearum causing potato bacterial wilt: host range and cultivars’ susceptibility in Rwanda

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