Southern blight (Sclerotium rolfsii Sacc.) of cowpea: yield-loss estimates and sources of resistance

Fery, Richard L.; Dukes, P. D.

doi:10.1016/s0261-2194(01)00122-3

Cited by 35 publications

(27 citation statements)

References 2 publications

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“…The yield loss of groundnut caused by S. rolfsii was 25%, but sometimes it reached to 80-90% (Grichar and Bosweel, 1987). Southern blight disease caused by S. rolfsii reduced 50-50.3% yield of different cultivars of cowpea (Fery and Dukes, 2002).…”

Section: Yield Loss Of Commercial Bush Bean Varieties Due To Infectiomentioning

confidence: 98%

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Yield loss assessment and management of foot rot (Sclerotium rolfsii) of bush bean

Alam

Islam

et al. 2018

Bangladesh J. Agric. Res

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The released three varieties of bush bean (BARI Jhar Shim-1, 2 and 3) were grown in both Sclerotium rolfsii inoculated and un-inoculated plots to assess the yield loss in the field of Plant Pathology Division, Bangladesh Agricultural Research Institute (BARI), Gazipur during 2013. Sclerotium rolfsii infected the bush bean plant in every growth stage and reduced the germination capacity and lessened plant vigor. The yield loss ranged from 55.43 to 64.94%. A screening study was conducted to observe the resistant level of released varieties and local lines collected from On Farm Research Division (OFRD), BARI, Sylhet during 2013. B0124 and BARI Jhar Shim-3 showed susceptible and the others showed highly susceptible reaction. The antagonistic potential of the local isolates of Trichoderma harzianum against the phytopathogenic S. rolfsii was investigated in dual culture and bioassay on bean plants. Isolated T. harzianum showed antagonism effect against S. rolfsii and restricted around 80% mycelial growth in-vitro. A field experiment was carried out in Plant Pathology Division, BARI, Gazipur during 2014 to observe the efficacy of T. harzianum in controlling foot rot disease induced by S.rolfsii of bush bean in the field. Soil treated with T. harzianum mass plus seed treated with Provax 200 WP showed the lowest disease incidence (28.47%) and the highest germination (98.61%) and yield (873.33 kg/ha) in compared to other treatments with pathogen inoculated soil.

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Section: Yield Loss Of Commercial Bush Bean Varieties Due To Infectiomentioning

confidence: 98%

“…Sothern blight disease of cowpea caused by S. rolfsii reduced pod numbers and dry-seed yields (Fery and Dukes, 2002). The un-inoculated plot (T1) showed the lowest disease incidence (10.06%) as well as highest 99.03% germination along with 1185.67 kg yield ha -1…”

Section: Efficacy Of T Harzianum Against S Rolfsii In Fieldmentioning

confidence: 99%

Yield loss assessment and management of foot rot (Sclerotium rolfsii) of bush bean

Alam

Islam

et al. 2018

Bangladesh J. Agric. Res

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“…Fery and Dukes sr. (2002) determined the cowpea resistance to S. rolfsii. There was signifi cant variability in cowpea germplasm for resistance to southern blight.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the virulence of Sclerotium rolfsii isolates on Arachis hypogaea and screening for resistant genotypes in greenhouse conditions

Eslami

Khodaparast

Mousanejad

et al. 2015

Hellenic Plant Protection Journal

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Summary Sclerotium rolfsii is a soil borne pathogen responsible for root and stem rot on a wide range of crops. This study was conducted to identify the virulence of diff erent S. rolfsii isolates on a susceptible local peanut germplasm and determine the resistance of 20 peanut genotypes to the most virulent isolate and also the relationship between virulence and mycelial compatibility groups (MCGs). Seventy eight isolates of this fungus from 10 host plants and six known MCGs were used in the experiment. The experiment was done in greenhouse conditions (25±5 o C) using a complete randomized block design with three replications. Pots containing sterile soil (pH=6.7) were inoculated with barley seeds colonized by each isolate separately before being seeded with the peanut germplasm. Disease severity was assessed by scoring the wilting, yellowing or death of plants, mycelia or sclerotia production on the soil surface or on plant stem, stem area aff ected (%) and stem lesion length, at the stage of plant maturity. Also, shoot wet weight and plant height were recorded at this stage. According to the results of the pathogenicity tests, all of the isolates were virulent on the susceptible peanut germplasm and the virulence diff ered signifi cantly between the isolates (P≤0.01). There was no relationship between the virulence of the fi ve groups of isolates identifi ed in the present study and the MCGs. The peanut genotype 140, which was better than the others based on seed size, plant height and the canopy size, was also the most resistant one.

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“…Toler et al [3], for example, assayed the economic importance of various diseases of cowpea in Georgia, concluding that southern blight, although a widespread problem, was responsible for an economic loss of less than 1%. More recently, Fery and Dukes [4] observed that the impact of southern blight on cowpea yield may be more attributable to reduced plant vigor than to plant mortality per se. They reported that the disease can cause dry-seed yield loss of up to 53.4%.…”

Section: Introductionmentioning

confidence: 99%

“…They concluded that none of the cultivars were immune to the disease, but noted that the plant reactions ranged from resistant to highly susceptible. Fery and Dukes [4] noted significant variability between cowpea germplasm lines in their reactions to S. rolfsii. They reported that two horticultural-type cultivars, Brown Crowder and Carolina Cream, exhibited promising levels of resistance in two years of testing.…”

Section: Introductionmentioning

confidence: 99%

Southern Blight (Sclerotium rolfsiiSacc.) of Cowpea: Genetic Characterization of Two Sources of Resistance

Fery

Dukes

2011

International Journal of Agronomy

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Field studies were conducted to characterize the genetic nature of resistance to southern blight (caused by Sclerotium rolfsii Sacc.) exhibited by the cowpea [Vigna unguiculata (L.) Walp.] cultivars Carolina Cream and Brown Crowder and to determine if a genetic relationship exists for this resistance between the two cultivars. Examination of the comparative frequency distributions of the parental and progeny populations of the "Carolina Cream" x "Magnolia Blackeye" and "Brown Crowder" x "Magnolia Blackeye" crosses and the corresponding segregation data indicates that the southern blight resistances exhibited by "Carolina Cream" and "Brown Crowder" are conditioned by single dominant genes. Examination of the segregation data from the parental and progeny populations of the "Carolina Cream" x "Brown Crowder" cross suggests that the two resistance genes are not allelic. The availability of each of the resistance genes in cultivar-type genetic backgrounds should allow for rapid incorporation of southern blight resistance genes into other cowpea cultivars by the application of conventional plant breeding methodologies.

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Southern blight (Sclerotium rolfsii Sacc.) of cowpea: yield-loss estimates and sources of resistance

Cited by 35 publications

References 2 publications

Yield loss assessment and management of foot rot (Sclerotium rolfsii) of bush bean

Yield loss assessment and management of foot rot (Sclerotium rolfsii) of bush bean

Evaluation of the virulence of Sclerotium rolfsii isolates on Arachis hypogaea and screening for resistant genotypes in greenhouse conditions

Southern Blight (Sclerotium rolfsiiSacc.) of Cowpea: Genetic Characterization of Two Sources of Resistance

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