1. Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI) University of Pretoria Pretoria South Africa
2. Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI) University of Pretoria Pretoria South Africa
3. Research and Development PT. Toba Pulp Lestari (TPL) Porsea North Sumatra Indonesia
4. Plant Health Program, Research and Development Asia Pacific Resources International Holdings Ltd. (APRIL) Pangkalan Kerinci Riau Indonesia