Citrus greening bacterium present in Tanzania
Citrus greening bacterium (EPPO A1 pest) as well as its African vector Trioza erytreae (EPPO A1 pest) are present in Tanzania. The areas of the disease spread can be divided into four zones:
Zone A: This zone includes the highlands with ;1200 m elevation. Citrus greening bacterium and the vector are widespread and occur in high populations.
Zone B: (800-1200 m elevation) Very high vector populations occur in this zone, but disease intensity is only moderate.
Zone C: (500-800 m elevation) This zone is characterized by a low vector population and disease intensity level.
Zone D: (;400 m elevation) Vector and disease are absent from these areas.
Evers, G.; Grisoni, M. (1991) Present situation of the citrus greening disease in Tanzania and proposal for control strategies.
Fruits (Paris) 46, 171-177.