Brown Root Rot

Letters to the Editor, May 6, 2013

A tree thought to have brown root rot. Photo: Nora Tam

Your detailed coverage of the plight of Hong Kong's urban and rural trees highlights the need for urgent action if we are to save at least some of our natural heritage.

Monday, 6 May, 2013, 2:55am 5 comments

Getting to the root of Hong Kong's tree problem

Sick trees suspected to have been infected with brown root rot disease are seen at Kam Shan Country Park. Photo: Nora Tam

The well-being of trees, admittedly, does not stand out as a matter of priority in our society, and government is not at the forefront as far as tree management is concerned. Unfortunately, a series of fatal accidents involving falling trees has put the problem under the public spotlight.

27 Apr 2013 - 3:32am 1 comment

Deadly foe is hard to recognise and defeat

Jim Chi-yung. Photo: Dickson Lee

Brown root rot is caused by a fungus with strong virulence named Phellinus noxius, which prefers acidic, hot and humid conditions. The disease has been found in the United States and tropical and subtropical regions in Asia, including southern Japan, the mainland, Taiwan, Malaysia and Singapore.

26 Apr 2013 - 5:39am

Brown root rot threatens Hong Kong's forests

Trees in locations from Kam Shan Country Park (left) to Admiralty (right) have been infected. Photos: Nora Tam

Apart from killing 17 heritage trees in urban areas, the incurable fungal condition has infected at least seven trees in Tai Po Kau Nature Reserve, one in the Observatory grounds in Tsim Sha Tsui and probably some in Kam Shan Country Park.

26 Apr 2013 - 5:56am

Brown root rot disease could be spread by humans

Brown root rot disease could be spread by humans

The wide spread of the virulent brown root rot disease in Hong Kong's trees may have been caused by human mistakes made worse by monkeys. Tree specialists say contamination of hikers' boots, use of improperly quarantined ornamental plants and soil carried by monkeys could all be factors.

26 Apr 2013 - 6:02am