Kubiriba, J., Legg, J.P., Tushemereirwe, W., & Adipala, E. 2001 Disease spread patterns of Banana streak virus in farmers' fields in Uganda.. Annals of Applied Biology 139(1): 31-36.

Notes: Three surveys were conducted to establish the disease spread patterns of Banana streak virus (BSV) in farmers' fields in Uganda. Transects were traced both across the fields and from infection foci within a field. BSV incidence in adjacent quadrants was also determined to quantify statistically the spatial relationships of infected plants in the fields. Severity assessment along transects across fields revealed clusters of plants with moderate to high severity and clusters of plants with no BSV or low severity. Symptom severity decreased away from foci of infection (b =-0.014; P= 0.0081). Observed frequency of infected quadrant counts differed from corresponding expected frequency of infected quadrant counts (Poisson's distribution, chi (2); p less than or equal to 0.01). BSV-infected plants, therefore, were aggregated in well-established fields. Aggregation of infected plants in farmers' fields and the decrease of severity away from infection foci suggest the likely involvement of a slow moving vector (mealybugs) in BSV transmission.