Agricultural experts have raised alarm over the growing economic and social impact of invasive pests, warning that they are costing Africa an estimated US$7 billion annually and undermining food security, livelihoods and regional trade.
Dr Victor Clottey, Regional Director for West Africa at the Centre for Agriculture and Bioscience International (CABI), said the consequences of pest invasions go far beyond financial losses, affecting education, healthcare access and household resilience.
He made the remarks at the opening of a three-day Regional Pest Risk Analysis (PRA) Workshop in Accra, organised under CABI’s PlantwisePlus Programme to strengthen West Africa’s capacity to prevent and manage invasive species.
The workshop brought together plant health experts and representatives from National Plant Protection Organisations across 16 West African countries to improve coordination in detecting and responding to pest threats.
Dr Clottey explained that pests often enter countries through trade, agricultural imports and even humanitarian food aid, stressing the importance of stronger inspection and prevention systems.
He warned that once invasive species become established, they are extremely difficult and expensive to control compared to early prevention efforts.
“Pests do not respect borders. If a dangerous pest is detected in one country, it becomes a concern for all neighbouring countries,” he said, adding that regional cooperation is essential.
He cited Banana Bunchy Top Disease as a major regional threat, noting that although Ghana has not recorded cases, surveillance across West Africa remains critical.
The Director of the Plant Protection and Regulatory Services Directorate (PPRSD), Mr Eric Bentsil Quaye, said pest risk analysis is now a key tool in modern biosecurity systems, especially as trade volumes and climate change increase vulnerability to pest spread.
He stressed that effective risk analysis supports evidence-based decision-making, strengthens quarantine systems and protects agricultural trade.
Senior Scientist in Invasive Species Management, Dr Lakpo Koku Agboyi, also highlighted a new digital Pest Risk Analysis tool developed by CABI to help countries assess and prevent biological invasions.
He said the platform aligns with international phytosanitary standards and will enhance national preparedness and response systems.
The workshop is part of ongoing regional efforts since 2023 to improve pest surveillance, risk assessment and cross-border collaboration in West Africa.
