Stem canker symptoms have been recorded in commercial teak and African mahogany plantations in North Queensland. They are caused by Erythricium salmonicolor, the organism responsible for pink disease in many tropical, woody crops. Symptoms include swelling or sunken areas on branches and the main stem, and cracking or splitting bark.
Symptoms have been associated with Erythricium salmonicolor, which causes pink disease in a wide range of tropical crops. Other organisms isolated from infection sites include Fusarium solani.
There are different forms of the fungus in affected trees:
The disease becomes important in wet, tropical conditions but serious damage only occurs where the rainfall exceeds 2000 mm per year.
Teak (Tectona grandis), African mahogany (Khaya senegalensis), and many tropical, woody crops, including breadfruit, carambola, citrus, custard apple, durian, jackfruit, mango, mangosteen and rambutan.
The fungus penetrates intact or wounded bark and eventually kills the cambial layer. Ultimately, large diameter branches and entire trees can be killed.
Surveys of teak plantations in North Queensland suggest that there is variation in susceptibility between trees.