The aim of the Hex Valley Project was to achieve economical control of fruit flies using an ecologically compatible method. This was largely been achieved. Other fruit production areas have since been included in the SIT programme, viz. the Elgin/Grabouw/Vyeboom and Villiersdorp (EGVV) areas, the Warm Bokkeveld, Wolseley and Tulbagh.
In these areas, approximately 14,000 ha of commercial fruit are being protected by ground releases of sterile male Medflies in strategic localities.