1. Agriculture Research Centre, Semongok; Dep. of Agriculture Sarawak; Borneo Height Rd. 93720 Kuching Sarawak Malaysia
2. Faculty of Science and Technology; Universiti Malaysia Terengganu; Mengabang Telipot 21030 Kuala Terengganu Terengganu Malaysia
3. Dep. of Basic Sciences and Environment, Faculty of Life Sciences; Univ. of Copenhagen; Thorvaldsensvej 40 DK-1871 Frederiksberg C Copenhagen Denmark