Farmers’ Knowledge on the Occurrence and Management of Potato Cyst Nematode (Globodera Spp.) in Kenya: A Diagnostic Survey-based Case Analysis

Abstract Potato cyst nematode (Globodera spp.) is a global quarantine pest that threatens potato production in Kenya. Since its first detection in 2015, Potato Cyst Nematode (PCN) has spread across major potato-growing wards and can cause yield losses exceeding 80% if unmanaged. Farmers’ knowledge of PCN occurrence, symptom recognition, and management remains limited, yet it is critical for early detection and the adoption of effective control strategies. This study assessed farmers’ knowledge, sources of information, and socio-demographic and institutional factors influencing PCN awareness and management. A cross-sectional survey of 188 farmers was conducted in the major potato-growing wards of Narok (Olloropil, Olokurto, Melili) and Elgeyo Marakwet (Lelan, Chepkorio, Kabiemit). Data were collected using pretested semi-structured questionnaires and analyzed using descriptive statistics, chi-square tests, and logistic regression. Results showed that 56% of farmers were aware of PCN, but only 14% could accurately identify its symptoms or mention effective management practices. Awareness varied markedly, with Olloropil (Narok) showing the highest (79%) and Chepkorio (Elgeyo Marakwet) the lowest (0%). Key information sources were fellow farmers (68%), extension officers (27%), and mass media (6%). Training (β = 5.344, p < 0.001), soil testing (β = 2.928, p < 0.001), and pest management challenges (β = 1.975, p = 0.013) were significant predictors of awareness. However, only 6.9% had accessed resistant varieties, and 13.3% had conducted soil tests for PCN. The findings highlight fragmented knowledge shaped by informal networks, limited institutional engagement, and uneven diagnostic access. Strengthening extension services, farmer education, and access to soil testing, alongside scaling resistant varieties, is essential to promote PCN management and safeguard potato production in Kenya.