Termite-tunnels formation on the surface of termite-resistant wood species in field sites
Y Kadekaru, K Kinjo, S Yaga
In this report, termite-tunnels formation by the subterranean termite, Coptotermes formosanus Shiraki on the surface of termite-resistant wood species, namely, Hinoki (Chamaecyparis abtsu), Yoshino Hinoki (Chamaecyparis abtsu), Miyazaki Hinoki (Chamaecyparis abtsu), Hiba (Chamaecyparis abtsu) and Japanese cedar (Cryptomeria japonica) was conducted in field sites. Westernhemlock (Tsuga heterophylla), Douglas- fir (Pseudotsuga taxifolia) and Ryukyu pine (Pinus luchuensis) were used as the control. 62 The termite-resistant woods species were classified either as heartwood timber (H) or sapwood timber with a heartwood center (S) and also classified based on their prefecture of origin. Otherwise, the termite- resistant wood species for the termite test were examined in using the forms on the surface of all the termite-resistant wood species by the subterranean termite, Coptotermes formosanus Shiraki. It was found that even for termite-resistant wood species treatment with preservative chemicals is required.
Keywords: SUBTERRANEAN TERMITE; COPTOTERMES FORMOSANUS; CHAMAECYPARIS ABTSU; HINOKI; YOSHINO HINOKI; MIYAZAKI HINOKI; HIBA; JAPANESE CEDAR; CRYPTOMERIA JAPONICA; FIELD TSTING; WESTERN HEMLOCK; TSUGA HETEROPHYLLA; DOUGLAS FIR; PSEUDOTSUGA TAXIFOLIA; RYUKYU PINE; PINUS LUCHUENSIS