A sample of thirty fence poles from each of fourteen tree native species from Northeast Mexico were tested in ground contact in a wood-cemetery area located in Linares, Nuevo Leon, Mexico. The samples were submitted to six treatments (control, debarked, chemical treated, used cooking oil, thermal and creosote) and randomly distributed in five blocks. The effectiveness of using a bark gauge tool “depth method” for decay determination was compared to visual method. Analysis of variance (ANOVA) for comparing natural durability between species, treatments, and monitoring system were determined by SAS (Statistical Analysis Software). Results showed that Hellieta parvifolia and Hevardia pallens were the most resistant on ground condition. Regarding to used cooking oil treatment (2.4 mm) it was found as the best for reducing wood decay followed by chemical method (2.4 mm) and finally, the debarked treatment (2.4). The higher decay rates were presented by thermal (2.8 mm) and control treatments (2.7 mm).

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