<p><em>Oil palm (Elaeis guineensis Jack) is an important plantation commodity for both agriculture and the economy, because its oil-producing potential is greater than that of other crops, such as corn, soybean and sunflower oil. The main disease of this plant is stem rot (BPB) caused by Ganoderma boninense. Therefore, it is necessary to know and identify BPB problems and their control efforts at PTPN VIII Palm Oil Plantation, Cikasungka. The study used a Randomized Block Design (RAK) with 3 observation blocks each covering an area of 25 ha, each block taken 5 observation plots with an area of 50 x 50 m2 each, then from each plot 5 sub-plots measuring 10 x 10 m2 were taken.</em><em> </em><em>Observational data were analyzed with variance and further tested by Duncan Multiple Range Test (DMRT). The results of this study indicate that the symptoms of disease in the garden are very diverse, ranging from mild to very severe. The signs of the disease can be identified through the fruiting bodies of Ganoderma boninense. The incidence of disease in all survey locations ranged from 16 – 38%, although in each location did not show significant differences. The percentage of disease severity was lowest in location B3 (5.75%) which had a significant effect compared to location B1. Location B1 had the highest disease severity, which was 23%. The control of BPB that has been carried out at the survey site includes the construction of isolation trenches followed by the application of biofungicides with the active ingredients of T. koningii and T. harzianum.</em><em></em></p>
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