26/11/2025
DISEASE OUTBREAK
Recent field assessments by IBERUN FARMS show that many cassava plants are currently affected by Cassava Bacterial Blight (CBB), a disease often mistaken for crop maturity, soil infertility, soil acidity, or even spiritual causes. Reported symptoms include leaf drying, wilting, premature leaf drop, and drying of stem tips.
Findings align with historical records of CBB, one of the oldest and most destructive cassava diseases, caused by Xanthomonas axonopodis pv. manihotis.
CBB originated in South America over 100 years ago and later spread to Africa through infected cassava cuttings.
Historical Background
1910s–1920s (First Discovery): Identified in South America, with early reports of leaf wilting, water-soaked spots, and die-back during rainy seasons. Scientists later confirmed its bacterial cause.
1930s–1950s (Spread to Africa): Introduced through infected cuttings into countries such as Nigeria, Congo, Ghana, and Uganda.
1960s–1980s (Major Outbreaks): CBB became widespread in Africa, causing yellowing, wilting, stem cankers, defoliation, reduced tuber size, and 20–70% yield losses. Research institutions like IITA responded with surveys, breeding programs, and farmer training.
1980s–2000s (Resistant Varieties Released): Development of varieties such as TMS 30572 and improved NRCRI lines helped reduce outbreaks.
Current Situation (2000s–2024)
CBB remains present but less severe in areas where farmers plant clean cuttings, use resistant varieties, and maintain good field hygiene.
2025 Farming Season
After six months of cultivation, CBB has significantly affected crop growth. Many farmers did not identify early symptoms, allowing the disease to spread.
The increased prevalence is linked to:
High rainfall , rain drop and humidity (climate change)
Movement of infected stems
Contaminated farm tools
Chewing insects such as grasshoppers
Economic Implications
The continued spread of CBB may lead to increased prices of garri, fufu, cassava stems, animal feed, and other cassava products in 2026.
Recommendations to Farmers
Contact IBERUN FARMS for professional support.