Natural durability of forty five wood species collected from several forest regions in Indonesia was tested against drywood termites (Light and subterranean termites (Cryptotermes cynocephalus Coptotermes curvignathus .) Holmgreen Natural durability tests against dry-wood termites and subterranean termites were conducted based on). Indonesian standard Results show that six wood species are classified as very durable wood (class I), SNI 7207:2014. eleven wood species are durable (class II), and 28 species belong to the low durability classes (class III, IV and V) against dry wood termites Light.. tests against substeranean termites (.) Similar (C cynocephalus C. curvignathus Holmgreen reveal that seven wood species are classified into highly resistant (durable class I), 14 wood species are resistant) (durable class II), and the remaining 24 wood species belong to durability class of III, IV, and V. The testing results indicate that wood with high natural durability against dry wood termites is not necessarily resistant to subterranean termites and vice versa.
Natural durability is determined through the tests of wood against wood attacking organisms. Natural durability of wood against marine borer was tested by exposing wood into the open sea water for six months. Damage intensity can be measured on the basis of digital image using Image-J software. This paper studies natural durability of nine wood species from Sumatera, Java and Kalimantan against marine borer. Results show that sempur lilin (Hoogl.), bambang lanang (L.var.) and kayu bawang ((Jack) Jacobs) were clasified into class durability I (very resistant), while cangcaratan ((Blume) Rehd. and aveangkelalai (ssp.) were classified into class durability II (resistant) against marine borer. Ki pasang (Miq.) and segelam () were grouped into class durability III (moderately resistant), while ki bugang (Blume) and ki langir (Blume) fall into class durability V (perishable). Damage intensity could be measured accurately using Image-J software. However, this method obtained higher damage percentage since the ex-rope hole was included in the measurement. Accordingly, the image method should be modified by excluding the ex-rope image to achieve high accuracy measurement.
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