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First report of the East African cassava mosaic virus-Uganda (EACMV-UG) infecting cassava (Manihot esculenta) in Cameroon.

Date de publication
mar, 23 Aoû 2011, 00:00
Dernière mise à jour effectuée le
août 22, 2011, 9:01 matin
Report Number
CMR-02/3
Pays
Cameroon
Identité de l'organisme nuisible
East African cassava mosaic virus - (EACMV0)
Situation du signalement
Final
Hôtes
Cassava (Manihot esculenta).
Pest Status (old values from ISPM 8 -1998 )
  • Present: only in some areas
Pest Status (ISPM 8 - 2021)
  • Present: not widely distributed and under official control
Distribution géographique
East African cassava mosaic virus-Uganda (EACMV-UG)was detected in samples from cassava fields in Kadey, Boumba-and-Ngoko, Lom-and-Djerem and Mbere divisions in the Eastern region of Cameroon.
Résumé

surveys were conducted for EACMV-Uganda (EACMV-UG), a recombinant virus responsible for severe CMD epidemics in East and Central Africa,which occurs in adjoining Republic of Congo (RC) and Gabon (Legg et al., 2004). Surveys were conducted during March to November 2009 in 156 fields in 37 administrative divisions in Cameroon. Six to eight samples from each field were collected from plants with distinct symptoms and severity,and analysed with the polymerase chain reaction (PCR) using primers. East African cassava mosaic virus-Uganda (EACMV-UG)was detected in samples from cassava fields in Kadey, Boumba-and-Ngoko, Lom-and-Djerem and Mbere divisions in the Eastern region of Cameroon.Incidence in fields ranged from 11.1% (Mbotoro) to 83.3% (Boyere). Urgent phytosanitary measures are required to prevent the spread of this disease.

Danger
This is the first report of EACMV-UG in Cameroon. Its occurrence in areas bordering EACMV-UG affected countries suggests the spread of the virus by white flies or infected cuttings. Urgent deployment of resistant varieties in the affected regions is necessary to prevent severe CMD epidemics and further spread of this virus into West Africa.
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