Criteria | Low risk of failure | High risk of failure |
---|---|---|
Phellinus pini (a) | < 3 conk clusters along trunk | > 3 conk clusters along trunk |
Peridermium harknessii (b) | < 50% trunk circumference | > 50% of trunk circumference |
Phaeolus schweinitzii (c) | < 50% structural roots | > 50% structural roots |
Ganoderma applanatum ((d)) | absence or small conk | large conk(s) at trunk base |
Heartrot in hardwood | < 33% strength loss | > 33% strength loss |
Bark beetles in pinese | absence | presence |
Physical deformities | absence | presence |
Lean | absence or natural lean | change in lean evident |
Size | increasing size raises risk | very large trees |
Health | survive longer than 2 years | death or near death |
↵a a heart rot of the trunks of the conifers.
↵b a canker disease in the pines which causes trunk deformation.
↵c a heart rot of the roots and lower trunk of the pines.
↵d a heart rot of the roots and lower trunk of hardwoods (2).
↵e Ips radiataβ and I. plastographus, have occasionally causing group pine mortality (2,7).