Economy
Natural fungus shows promise in controlling African armyworm outbreaks in East Africa
What happened
Researchers have identified a naturally occurring fungus that could help farmers in East Africa combat African armyworm infestations, which threaten staple crops like maize and sorghum. Field trials in Kenya and Ethiopia show the fungus, Beauveria bassiana, significantly reduces armyworm populations without chemical pesticides.
Key facts
Field trials in Kenya and Ethiopia demonstrated a 70-90% reduction in armyworm populations after applying Beauveria bassiana.
The fungus was tested on maize and sorghum crops, which are critical food sources in the region.
Researchers noted the fungus acts within 5-7 days of application, targeting armyworm larvae.
The study was led by scientists from CABI (Centre for Agriculture and Biosciences International) and local agricultural agencies.
Outbreaks of the African armyworm have been recorded in 2017, 2020, and 2023, causing widespread crop losses.
Context
The African armyworm (Spodoptera exempta) is a migratory pest that devastates crops across sub-Saharan Africa. Outbreaks occur cyclically, often linked to seasonal rains, and can destroy up to 80% of maize yields in affected regions. Chemical pesticides used to control the pest have raised concerns about environmental harm and pest resistance. Biological control methods, including fungi like Beauveria bassiana, are being explored as sustainable alternatives.