Abstract: Cassava is a main staple food for 800 million people world-wide. Production is limited by pest
and pathogens. The most devastating cassava viruses are Cassava Brown Streak Virus and
Uganda Cassava Brown Streak Virus- both causing severe root necrosis called Cassava Brown
Streak Disease. In the last 10 years, the Cassava Brown Streak Disease (CBSD)has spread across
Africa from the east coast of Africa to central Africa. Similar root necrosis to cassava brown
streak disease has also been identified in the Democratic Republic of Congo where the first
symptoms were identified in 2002 in Kinshasa and Kongo central province. In 2012, the
presence of CBSD was confirmed in eastern Democratic Republic of Congo. All attempts since
2002 in western Democratic Republic of Congo to identify the cause of these root necrosis have
failed. In 2017, a team of scientists surveying the Songololo Territory in the Kongo central
province at the northern Angola, identified the same root necrosis similar to CBSD in several
localities bordering Angola. These unexpected results will foreshadow the presence of cassava
root necrosis in Angola. This preliminary investigation in northern Angola was conducted
specifically in the Zaire province and the territory of Mbanza Kongo at approximatively 62 kms
from the Democratic Republic of Congo border in order to verify, whether or not, these root
necrosis are present in Angola. Results obtained from this exploratory survey in several fields of
the Zaire province and territory of Mbanza Kongo confirmed, for the first time, the presence of
cassava root necrosis in Angola, similar to CBSD, as identified in western DRC |