Assessment of levels of resistance of cotton cultivars to isolates of Xanthomonas malvacearum (E.F. Smith) Dowson in Nigeria

Poswal, M. A. T.; Erinle, I. D.

doi:10.1016/0261-2194(84)90012-7

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…Investigation here revealed the presence of angular leaf spot, vein blight and boll rot phases of bacterial blight on the genotypes used in the study areas. Poswal and Erinle (1984) had earlier reported the presence of these manifestations except of the blackarm phase in Nigeria. SAMCOT-9, Cotton bacterial blight assessment 1007 SAMCOT-11, SAMCOT-13 and ex-Benin were highly susceptible to the disease in all these locations.…”

Section: Discussionmentioning

confidence: 92%

Assessment of resurgence of bacterial blight and its effect on cotton yield in northern Nigeria

Gwary

Nahunnaro

Okusanya

2009

Archives Of Phytopathology And Plant Protection

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Cotton production in Nigeria causes fluctuating socio-economic and biotic factors. Bacterial blight induced by Xanthomonas campestris pv malvacearum causes the greatest yield loss annually. A study was therefore carried out to investigate the resurgence of the disease on 10 different cotton genotypes in Dowaya, Kem and Ngurore which are the major cotton areas of Adamawa state of Nigeria under field conditions. Other objectives were to determine the relationship between the different manifestations of bacterial blight and the yield of seed cotton and to identify resistance in the selected genotypes to the disease manifestations. Results revealed the presence of angular leaf spot, vein and boll rot manifestations of the disease in the study areas. The absence of vein blight symptoms in the Kem location did not result in higher yield because the severity of the leaf spot for this location was relatively higher than for the other two locations. Results also revealed that despite the high severity of angular leaf spot, high boll rot and vein blight incidences observed particularly on SAMCOT-11, SAMCOT-13 and ex-Benin in these locations with a high yield of seed cotton was recorded. The three multi-adversity resistant genotypes (MAR), TX-CDP37HH-1-83, TAMCOT SP-21S and TAMCOT CAMD-E recorded relatively lower severity and incidences in both cases. There was, however, a significantly negative correlation between angular leaf spot severity, boll rot incidence and yield at Kem location, significant negative correlation between angular leaf spot severity, boll rot incidence, vein blight and yield at Dowaya location, as well as significant negative correlation between angular leaf spot severity, vein blight and yield at Ngurore location. The tolerant and high yielding SAMCOT-11, SAMCOT-13 and ex-Benin should through breeding work be improved to be used for production in this area and its surroundings.

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Section: Discussionmentioning

confidence: 92%

Assessment of resurgence of bacterial blight and its effect on cotton yield in northern Nigeria

Gwary

Nahunnaro

Okusanya

2009

Archives Of Phytopathology And Plant Protection

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Races of Xanthomonas campestris pv. malvacearum (Smith) Dye, the Causal Organism of Bacterial Blight of Cotton, in Nigeria

Poswal

1988

Journal of Phytopathology

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Races 6, 7 and 10 of Xanthomonas campestris pv. malvacearum (Smith) Dye, the causal organism of bacterial blight of cotton, were identified among twelve isolates of the pathogen from the three cotton growing zones of Nigeria. Races 7 and 10 were, however, predominant. The races were distinguished by inoculation of eight cotton lines known to differentiate through possession of different resistance genes. Further work is necessary, on a much greater number of isolates, to determine therange and distribution of different virulence types in Nigeria.

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Assessment of levels of resistance of cotton cultivars to isolates of Xanthomonas malvacearum (E.F. Smith) Dowson in Nigeria

Cited by 2 publications

References 11 publications

Assessment of resurgence of bacterial blight and its effect on cotton yield in northern Nigeria

Assessment of resurgence of bacterial blight and its effect on cotton yield in northern Nigeria

Races of Xanthomonas campestris pv. malvacearum (Smith) Dye, the Causal Organism of Bacterial Blight of Cotton, in Nigeria

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