mosaic geminiviruses (CMGs) and Cassava
brown streak virus (CBSV) cause diseases of major economic significance to
cassava in Kenya. The Western region of Kenya contributes about 60% of cassava
production in the country. Currently CBSD distribution is being newly reported
in the Western region where over 90% CMD incidences have been observed.
Transmission studies have confirmed that B.
tabaci transmits both CMGs and CBSV. The co-occurrence of the vector, CMGs
and the newly reported CBSV undoubtedly raises the alarming possibility of a
„dual pandemic‟. This study was designed to investigate the dual virus spread,
the possible interactions of CMGs and CBSV on the host plant and their effect
on the development of symptoms on the popular cassava varieties. To evaluate
the status of the two viruses on the local popular varieties in terms of
incidence, prevalence and severity, a survey was conducted in Kakamega, Teso,
Bungoma, Siaya and Busia districts in Western Kenya and 273 samples collected
from 67 farmer‟s fields. The CMGs and CBSV were confirmed by polymerase chain
reaction (PCR) and reverse transcriptase polymerase chain reaction (RT- PCR)
respectively. The CMD incidence among the varieties was highest in
Embwanatereka 89%, Serere 87%, Adhiambolera 86%, and lowest in Kibandameno 83%
while CBSD incidence was highest in Serere 73%, Adhiambolera 69%, and
Kibandameno 56% and lowest in Embwanatereka 51%. To assess the possible
interactions of the two viruses, 10 Nicotiana
benthamiana plants were sap inoculated with CMGs and CBSV singly and in
combination in two trials. A highly significant difference (P<0.05) was
observed in the interaction of the virus and time. At 30 days post inoculation,
dual infection of CMD+CBSD showed the highest severity score (4.7) followed by
CBSV (4.1) and CMD (3), suggesting synergistic interaction of the two viruses
when occurring together.
AfroAsia, R (2021). Prevalence And Co-infection Of Cassava With Cassava Mosaic Geminiviruses And Cassava Brown Streak Virus In Popular Cultivars In Western Kenya. Afribary.com: Retrieved June 21, 2021, from https://afribary.com/works/prevalence-and-co-infection-of-cassava-with-cassava-mosaic-geminiviruses-and-cassava-brown-streak-virus-in-popular-cultivars-in-western-kenya
Research, AfroAsia. "Prevalence And Co-infection Of Cassava With Cassava Mosaic Geminiviruses And Cassava Brown Streak Virus In Popular Cultivars In Western Kenya" Afribary.com. Afribary.com, 06 Jun. 2021, https://afribary.com/works/prevalence-and-co-infection-of-cassava-with-cassava-mosaic-geminiviruses-and-cassava-brown-streak-virus-in-popular-cultivars-in-western-kenya . Accessed 21 Jun. 2021.
Research, AfroAsia. "Prevalence And Co-infection Of Cassava With Cassava Mosaic Geminiviruses And Cassava Brown Streak Virus In Popular Cultivars In Western Kenya". Afribary.com, Afribary.com, 06 Jun. 2021. Web. 21 Jun. 2021. < https://afribary.com/works/prevalence-and-co-infection-of-cassava-with-cassava-mosaic-geminiviruses-and-cassava-brown-streak-virus-in-popular-cultivars-in-western-kenya >.
Research, AfroAsia. "Prevalence And Co-infection Of Cassava With Cassava Mosaic Geminiviruses And Cassava Brown Streak Virus In Popular Cultivars In Western Kenya" Afribary.com (2021). Accessed June 21, 2021. https://afribary.com/works/prevalence-and-co-infection-of-cassava-with-cassava-mosaic-geminiviruses-and-cassava-brown-streak-virus-in-popular-cultivars-in-western-kenya