NURCAHAYA PURBA. Efficacy of Formulations Containing Ginger, Temulawak, Turmeric Extracts Against Ganoderma boninense Causes Basal Stem Rot in Oil Palm Seedlings (Supervised by SUWANDI). Oil palm (Elaeis guineensis Jacq.) is a very important commodity in plantations. Palm oil produces the most vegetable oil compared to other perennial crops. Disease has always been an obstacle in the growth of …