International Journal of Pest Management (2005) 51, 17-23

P. Sseruwagi, G. Okao-Okuja, A. Kalyebi, S. Muyango, V. Aggarwal and James P. Legg (2005)
Cassava mosaic geminiviruses associated with cassava mosaic disease in Rwanda
International Journal of Pest Management 51 (1), 17-23
Abstract: Cassava mosaic disease (CMD), and cassava mosaic geminiviruses (CMGs), were investigated in a country-wide survey conducted in six cassava-producing prefectures (administrative regions) of Rwanda in 2001. CMD occurred throughout the country at an average incidence of 30%. Incidence was highest in Kigali (44%) and lowest in Butare (11%). Cutting infection resulting from the use of CMD-affected planting material was the main type of infection. Disease symptoms were generally severe, with little difference between cultivars or locations. Most affected plants lacked the 'candle-stick' symptoms characteristic of severe CMD associated with infection by the 'Uganda Variant' of East African cassava mosaic virus (EACMV-UG2). PCR analysis detected two viruses in CMD-affected plants: African cassava mosaic virus (ACMV) and EACMV-UG2. ACMV predominated and occurred throughout the surveyed areas, whereas EACMV-UG2 was restricted to the prefectures of Byumba, which border south-western Uganda and Kibungo in south-eastern Rwanda. No dual infections were detected.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Peter Sseruwagi, James P. Legg, Andrew Kalyebi

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	African cassava mosaic virus	Cassava (Manihot esculenta)	Rwanda
	East African cassava mosaic virus	Cassava (Manihot esculenta)	Rwanda