Prevalence and severity of bacterial blight and anthracnose diseases of cassava in different agroecological zones of Nigeria
Geo-referenced surveys were conducted in 2001 and 2003 to assess the prevalence and severity of cassava bacterial blight (CBB) and cassava anthracnose disease (CAD) in different agro-ecological zones of Nigeria. A total of 132 fields were visited in 2001 as follow: humid forest (HF) 42, derived sava...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal Article |
| Language: | Inglés |
| Published: |
2008
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/90883 |
| _version_ | 1855528815374106624 |
|---|---|
| author | Onyeka, T.J. Owolade, O.F. Ogunjobi, A.A. Dixon, Alfred G.O. Okechukwu, R.U. Bamkefa, B. |
| author_browse | Bamkefa, B. Dixon, Alfred G.O. Ogunjobi, A.A. Okechukwu, R.U. Onyeka, T.J. Owolade, O.F. |
| author_facet | Onyeka, T.J. Owolade, O.F. Ogunjobi, A.A. Dixon, Alfred G.O. Okechukwu, R.U. Bamkefa, B. |
| author_sort | Onyeka, T.J. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Geo-referenced surveys were conducted in 2001 and 2003 to assess the prevalence and severity of
cassava bacterial blight (CBB) and cassava anthracnose disease (CAD) in different agro-ecological
zones of Nigeria. A total of 132 fields were visited in 2001 as follow: humid forest (HF) 42, derived
savannah (DS) 38, southern guinea savannah (SGS) 16, northern guinea savannah (NGS) 16 and Sudan
savannah (SS) 20. In 2003, 277 fields were visited: HF (83), DS (143), SGS (22), NGS (11), and SS (18).
CBB prevalence was greater than 70% in all ecozones in 2001; 33.7% in HF, 65.7% in DS and greater
than 90% in others in 2003. CAD prevalence was greater than 90% in HF for the two surveys, 44.7% and
61.5% for 2001 and 2003 respectively in DS, while it was not observed in the other zones. In both
surveys, more than 80% of CBB infected fields in all ecozones were moderately severe, except in SS
where 47% of fields in 2003 were highly severe. In both HF and DS, more than 30% of fields in 2001, and
less than 20% in 2003, had highly severe CAD symptoms. Prevalence of CBB was negatively correlated
with annual precipitation and positively correlated with maximum temperature of the ecozones, while
prevalence of CAD had strong positive relationship with the annual precipitation and negative
association with maximum temperature. The distribution patterns of the diseases found in this study
provide a baseline for disease management programme in the rapidly expanding cassava industry in
Nigeria, and implications of the results for cassava industry were discussed. |
| format | Journal Article |
| id | CGSpace90883 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2008 |
| publishDateRange | 2008 |
| publishDateSort | 2008 |
| record_format | dspace |
| spelling | CGSpace908832023-06-12T15:44:02Z Prevalence and severity of bacterial blight and anthracnose diseases of cassava in different agroecological zones of Nigeria Onyeka, T.J. Owolade, O.F. Ogunjobi, A.A. Dixon, Alfred G.O. Okechukwu, R.U. Bamkefa, B. anthracnose bacterial blight cassava colletotrichum gloeosporioides prevalence severity xanthomonas axonopodis cassava industry agroecological zones Geo-referenced surveys were conducted in 2001 and 2003 to assess the prevalence and severity of cassava bacterial blight (CBB) and cassava anthracnose disease (CAD) in different agro-ecological zones of Nigeria. A total of 132 fields were visited in 2001 as follow: humid forest (HF) 42, derived savannah (DS) 38, southern guinea savannah (SGS) 16, northern guinea savannah (NGS) 16 and Sudan savannah (SS) 20. In 2003, 277 fields were visited: HF (83), DS (143), SGS (22), NGS (11), and SS (18). CBB prevalence was greater than 70% in all ecozones in 2001; 33.7% in HF, 65.7% in DS and greater than 90% in others in 2003. CAD prevalence was greater than 90% in HF for the two surveys, 44.7% and 61.5% for 2001 and 2003 respectively in DS, while it was not observed in the other zones. In both surveys, more than 80% of CBB infected fields in all ecozones were moderately severe, except in SS where 47% of fields in 2003 were highly severe. In both HF and DS, more than 30% of fields in 2001, and less than 20% in 2003, had highly severe CAD symptoms. Prevalence of CBB was negatively correlated with annual precipitation and positively correlated with maximum temperature of the ecozones, while prevalence of CAD had strong positive relationship with the annual precipitation and negative association with maximum temperature. The distribution patterns of the diseases found in this study provide a baseline for disease management programme in the rapidly expanding cassava industry in Nigeria, and implications of the results for cassava industry were discussed. 2008 2018-02-06T12:15:14Z 2018-02-06T12:15:14Z Journal Article https://hdl.handle.net/10568/90883 en Open Access Onyeka, T.J., Owolade, O.F., Ogunjobi, A.A., Dixon, A.G.O., Okechukwu, R. & Bamkefa, B. (2008). Prevalence and severity of bacterial blight and anthracnose diseases of cassava in different agro-ecological zones of Nigeria. African Journal of Agricultural Research, 3(4), 297-304. |
| spellingShingle | anthracnose bacterial blight cassava colletotrichum gloeosporioides prevalence severity xanthomonas axonopodis cassava industry agroecological zones Onyeka, T.J. Owolade, O.F. Ogunjobi, A.A. Dixon, Alfred G.O. Okechukwu, R.U. Bamkefa, B. Prevalence and severity of bacterial blight and anthracnose diseases of cassava in different agroecological zones of Nigeria |
| title | Prevalence and severity of bacterial blight and anthracnose diseases of cassava in different agroecological zones of Nigeria |
| title_full | Prevalence and severity of bacterial blight and anthracnose diseases of cassava in different agroecological zones of Nigeria |
| title_fullStr | Prevalence and severity of bacterial blight and anthracnose diseases of cassava in different agroecological zones of Nigeria |
| title_full_unstemmed | Prevalence and severity of bacterial blight and anthracnose diseases of cassava in different agroecological zones of Nigeria |
| title_short | Prevalence and severity of bacterial blight and anthracnose diseases of cassava in different agroecological zones of Nigeria |
| title_sort | prevalence and severity of bacterial blight and anthracnose diseases of cassava in different agroecological zones of nigeria |
| topic | anthracnose bacterial blight cassava colletotrichum gloeosporioides prevalence severity xanthomonas axonopodis cassava industry agroecological zones |
| url | https://hdl.handle.net/10568/90883 |
| work_keys_str_mv | AT onyekatj prevalenceandseverityofbacterialblightandanthracnosediseasesofcassavaindifferentagroecologicalzonesofnigeria AT owoladeof prevalenceandseverityofbacterialblightandanthracnosediseasesofcassavaindifferentagroecologicalzonesofnigeria AT ogunjobiaa prevalenceandseverityofbacterialblightandanthracnosediseasesofcassavaindifferentagroecologicalzonesofnigeria AT dixonalfredgo prevalenceandseverityofbacterialblightandanthracnosediseasesofcassavaindifferentagroecologicalzonesofnigeria AT okechukwuru prevalenceandseverityofbacterialblightandanthracnosediseasesofcassavaindifferentagroecologicalzonesofnigeria AT bamkefab prevalenceandseverityofbacterialblightandanthracnosediseasesofcassavaindifferentagroecologicalzonesofnigeria |