Selection of Teak Provenances for Rust (Oliva tectonae) Resistance

Two provenances of Teak (Tectona grandis L. f.), 3070 from Suugam, and 3072 from Masale of India, which have strong resistance to the Teak Rust (Oliva tectonae Thirum) have been selected after several years' observations and repeated tests. The disease condition indexes of 3070 and 3072 are 2.0% and 9.4% respectively,and the indexes of disease infection are 3.5% and 9.9% of that of the standard provenance respectively. Furthermore, their rust-resistance is quite stable. Summing up the evaluation for 7 characters namely disease-resistance,drought-resistance,volume growth, persistence of axis, degree of straight-bole, branching type and branch size, the aggregate index values of the two provenances increased respectively by 43%~97.5% and 31.4%~86.8% as compared to that of the standard provenance, and were 1.5 and 2.25 times as much as the mean aggregate index values of the provenances from Myanmar, Thailand, Laos and Vietnam. The two provenances are considered to be the superior ones in Hainan Island.