1. Faculty of Agrotechnology and Plantation, Universiti Teknologi MARA (UiTM), Sarawak Branch, Samarahan Campus, Samarahan, Sarawak, Malaysia;
2. Faculty of Agrotechnology and Plantation, Universiti Teknologi MARA (UiTM), Shah Alam, Selangor, Malaysia;
3. Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, Serdang, Selangor, Malaysia;
4. Department of Agronomy, Faculty of Agriculture, Bayero University Kano, Kano, Nigeria;
5. Faculty of Chemical Engineering, Universiti Teknologi MARA (UiTM), Sarawak Branch, Samarahan Campus, Kota Samarahan, Malaysia;
6. Faculty of Chemical Engineering, Universiti Teknologi MARA (UiTM), Shah Alam, Malaysia;
7. Institute of Agricultural Research for Development (IRAD), Ekona Regional Research Centre, Oil Palm Pathology Laboratory PMB 25, Buea, Cameroon;
8. GanoDROP Unit, Biological Research Division, Malaysia Palm Oil Board (MPOB), Kajang, Selangor, Malaysia;
9. Laboratory of Food Crops, Institute of Tropical Agriculture, Universiti Putra Malaysia, Serdang, Selangor, Malaysia