The Disease Management Unit provides the following general strategies for management of tropical and subtropical crop diseases:
Exclude the pathogen - prevent inoculum from coming into an area where the pathogen does not occur (e.g. quarantines, inspections, certifications).
Eradicate the pathogen - remove or reduce inoculum (e.g. rotation, sanitation, eliminating alternate hosts, heat treatment, some pesticides).
Protect the healthy plant against infection - provide a "barrier" (chemical, biological or physical) between the host plant and pathogen.
Genetic resistance of the plant against the pathogen - grow a less susceptible host plant.
Avoidance - avoid development of a disease on a plant(s) even though it does occur in the area.
In addition the unit, provides an essential service to the national Citrus Improvement Programme (CIP) by elimi-nating viruses from citrus mother stock. In addition, this division perfected the technique of pre-immunising all citrus released to nurseries against citrus tristeza virus (CTV) by means of mild strain inoculation.
For enquiries regarding the current research activities of the
Disease Management unit, contact
Dr Mbulelo Ncango.
Postal address: ARC-ITSC, Private Bag X 11208, Mbombela, South Africa, 1200
Physical address: ARC-TSC,
Disease Management Unit, Corner Bosch Street and Ka Nyamazane Road Rd 2296,
Mbombela, South Africa, 1201
Researchers of the Disease Management unit are currently involved in the following research projects: