<![CDATA[ Abstract: The purpose of this study was to determine the effectiveness of the use of two types of tuba root extract, namely milk sap tuba root and clear sap tuba root in Wood Preservation of Gmelina (G. arborea Roxb) against subterranean termites. The method of testing against subterranean termites is using the burial method for 12 weeks. Wood resistance is calculated from the percentage of weight loss and the degree of termite attack on wood according to SNI 01-7207-2006 concerning the classification of wood resistance to subterranean termite attacks. the results of the study, it was concluded that the use of preservatives for milk sap tuba root and clear sap tuba root with concentrations of 2% and 4% were not considered effective for preserving Gmelina wood from subterranean termites. Keywords: Gmelina wood, preservation, milk sap tuba root, clear sap tuba root, subterranean termites, loss of weight, degree of attack.Abstrak: Tujuan dari penelitian ini adalah untuk mengetahui efektifitas penggunaan dua jenis ekstrak akar tuba yaitu akar tuba getah susu dan akar tuba getah bening dalam pengawetan kayu Gmelina (G. arborea Roxb) terhadap Rayap Tanah. Metode pengujian rayap tanah menggunakan metode penguburan selama 12 minggu. Ketahanan kayu dihitung dari persentase kehilangan berat dan derajat serangan rayap pada kayu menurut SNI 01-7207-2006 tentang klasifikasi ketahanan kayu terhadap serangan rayap tanah. Berdasarkan hasil penelitian disimpulkan bahwa penggunaan bahan pengawet akar tuba getah susu dan akar tuba getah bening dengan konsentrasi konsentrasi 2% dan 4%, dinilai belum efektif untuk di jadikan bahan mengawetkan kayu Gmelina dari serangan Rayap Tanah. Kata kunci: Kayu Gmelina, pengawetan, akar tuba getah susu, akar tuba getah bening, rayap tanah, Kehilangan berat, derajat serangan.]]>
