MANUAL No - Forest and Wood Products Australia

Manual No. 8: Termite Attack 17
Estimated averaged annual probability of termite attack
0.015
0.010
0.005
0.000
Internal Termite Incidence for Various Floor Types
timber
concrete
timber + concrete
1 2 3
Temperature zones
Figure 2.10. Effect of zone on the apparent termite for various floor types
(temperature zonation).
2.3 Analysis of Termite Tally Data Based on Agro-Ecological Zonation
2.3.1 Zonation Procedure
The agro-ecological zonation of termite hazard was developed by Cookson (1999) and is
based on agro-ecological regions of Australia as defined by the Commonwealth of Australia
(1991) and illustrated in Figure 2.11. These regions are then broken down into sub-regions as
shown in Table 2.6 and accordingly numbered. After dropping sub-regions 1 and 17 where
there are virtually no termite incidences found, all other sub-regions are grouped into 4 zones
as follows:
Zone 1 (low hazard): 14;
Zone 2 (medium hazard): 10, 11, 15, 18;
Zone 3 (high hazard): 5-8, 13, 19-21; and
Zone 4 (very high hazard): 2-4, 9, 12, 22.
A termite hazard map, based on this zonation is shown in Figure 2.12.
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