Australia’s forests and forestry glossary

A symptom of disease agents or environmental factors in which foliage dies progressively from the extremities and trees exhibit loss of vigour. Used in reference to native forests affected by one or more of salinity, drought, pest load (including as a result of abundant Bell Miner birds), disease (such as Phytophthora), or changed nutrient, water or fire regimes; or in reference to trees on land subjected to overgrazing.

See Phytophthora.