Detailed Inspections

O’Brien Horticulture Professional Tree Care & Landscape can undertake Detailed Inspections of trees identified during the Preliminary Survey as having signs of structural weakness and / or adaptive growth 4. Decay Detection Testing OBH-47patterns that may represent symptoms of defects caused by fungal wood decay organisms.

The location and conformation of the sound wood adjacent to a decay column are essential considerations for assessing any mechanical weakness. The Detailed Inspections are conducted using a non-invasive PiCUS Sonic Tomograph to map the extent of decay / defects within trees. When the detailed investigations establish the presence and extent of any decay / defect, a further (invasive) test is conducted using an IML Resistograph probe to confirm the extent of the remaining healthy wood.

The assessment of mechanical weakness in a stem or branch generally requires the reasonably accurate mapping of decay and cavities at a given location in the tree. The data needed for such mapping can be provided by the above devices, which can locate decay in various states of development.

5. Decay Detection Mapping OBH-48

Accuracy increases with the number of positions from which readings are made around the circumference of the stem or branch. These devices record the extent and location of altered wood within a stem or branch at a chosen axial position; they have the facility of recording the data directly onto paper or onto electronic media for computer display and analysis. The accuracy of these devices suits them well for the mapping of decayed zones or cavities.





spec tomograph picus-1
click to enlarge