RETENSI DAN EFEKTIVITAS BAHAN PENGAWET LARUTAN DAUN EBONI (Diospyros Celebica Bakh.) PADA KAYU BAYUR (Pterospermum Javanicum Jungh) TERHADAP SERANGAN RAYAP TANAH

In Indonesia, tropical climate conditions strongly support the growth of wood-destroying
organisms on wood that will be used as raw material for industry and housing. This study aims to
determine the retention and effectiveness of ebony leaf solution (Diospyros celebica Bakh.) on bayur
wood (Pterospermum javanicum Jungh) against subterranean termites. The research was conducted
in March – May 2023. This research method used a Factorial Completely Randomized Design (CRD),
factor (a) concentration of preservatives in ebony leaf solution (100gr, 150gr and 200gr)/1 liter of
water and factor (b) soaking time of the wood in preservative solution (1, 3 and 5) days, there were 9
treatments each with 5 replications, a total of 45 wood samples. The sample test for water content and
density is 2 cm x 2 cm x 2 cm, the wood test sample is 2 cm x 2 cm x 30 cm. The highest average
retention value was found at a concentration of 200gr/1 liter of water with 5 days of immersion
(A3B3) of (0.060gr/cm3). The lowest average retention value was found at a concentration of 100gr/1
liter of water with 1 day immersion time (A1B1) of (0.015gr/cm3). The average value of the highest
weight loss concentration treatment was found in 150gr/1 liter of water, namely 8.70%. The average
value of the lowest concentration treatment for weight loss was found in 200gr/1 liter of water, namely
2.64%.