Methods of controlling dikvoet, leaf wilters and other diseases and pests.
Major diseases affecting granadilla yields in South Africa include:
Damping off of seedlings caused by fungi as a result of poor seedbed management. In ‘damping off’, various pathogens (germs) kill or weaken seeds or seedlings before or after they germinate. It is most prevalent in wet and cool conditions.
Foot rot (dikvoet), where the base of the stem thickens, causing cracks in the soil surface through which numerous secondary organisms can enter. This results in complete rotting of the stem. Waterlogging and over-irrigation increase the incidence of the disease.
Various viruses causing symptoms such as spots, mosaics and distortion. It is usually very difficult to identify the specific virus involved.
Source: Infopak compiled by department of agriculture, in co-operation with the ARC-Institute for Tropical and Subtropical Crops.
The Competition Commission recently raided the offices of nine market agencies at the Johannes...