Using ecological and climate variables to understand severity of the 'citrus greening' disease caused by the Trioza erytreae vector in eastern Africa

Within the Strengthening Citrus production systems through the introduction of IPM measures for pests and diseases in Kenya and Tanzania (SCIPM), The Geo-Information Unit is contributing important insights into the ‘greening’ diseases in citrus using ecological and climate variables so that disease severity can be understood and effectively mitigated.

The map below indicates habitat suitability for Trioza erytreae in western to southern Kenya. Red areas indicate high probability of occurence while blue indicates low probability of occurence.


  • German Ministry of Economic Cooperation and Development (BMZ)


  • Center for Development Research (ZEF), University of Bonn, Germany
  • Texas A&M University, USA; Citrus Research International, South Africa 
  • Kenya Plant Health Inspectorate Service (KEPHIS)
  • Kenya Agricultural and Livestock Research Organisation (KALRO)
  • University of Nairobi, Kenya
  • Ministry of Agriculture, Food Security & Cooperative (MAFSC), Tanzania 
  • Mikocheni Agricultural Research Institute, Tanzania
  • Real IPM Ltd, Kenya