Phomopsis canker of Metrosideros polymorpha
The fungal pathogen Phomopsis causes a localized canker in ‘ōhi‘a, Metrosideros polymorpha. Visual symptoms include branch mortality and swelling and cracking of bark at the infection point. Symptoms are similar to symptoms of Rapid ‘Ōhi‘a Death (caused by Ceratocystis spp.), but Phomopsis canker usually just kills smaller branches and not the whole tree. Ceratocystis infection typically does not produce branch swelling and cracked bark. Branches infected by Phomopsis may be pruned off, and in areas where Ceratocystis is present it is recommended to use a pruning paint or wound sealer on the wounds.
Hilo, Hawaii Island, Hawaii.
Phomopsis canker of Metrosideros polymorpha
The fungal pathogen Phomopsis causes a localized canker in ‘ōhi‘a, Metrosideros polymorpha. Visual symptoms include branch mortality and swelling and cracking of bark at the infection point. Symptoms are similar to symptoms of Rapid ‘Ōhi‘a Death (caused by Ceratocystis spp.), but Phomopsis canker usually just kills smaller branches and not the whole tree. Ceratocystis infection typically does not produce branch swelling and cracked bark. Branches infected by Phomopsis may be pruned off, and in areas where Ceratocystis is present it is recommended to use a pruning paint or wound sealer on the wounds.
Hilo, Hawaii Island, Hawaii.