• Bacterial blast - canker

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Bacterial Blast - Canker

Bacterial blast is also known as gummosis and bacterial canker. It can seriously damage and kill fruit trees such as plum, apricot, cherry, peach and nectarine.

Identifying

Most obvious in spring, the symptoms of bacterial blast include dieback, oozing amber gum that has a sweet smell, browning blossums and dark spots on leaves.

Solving

Prevention is the best way to control bacterial blast:

  • Only prune trees during dry weather.
  • Seal prunning wounds with pruning sealer.
  • Prune to keep good airflow through trees.
  • Disinfect pruning equipment with dilute bleach or meths between trees and pruning.
  • Carry out a winter spray program .

If your trees are showing symptoms of bacterial blast:

  • Prune out all affeted limbs at least 10 cm below obvious signs.
  • Apply a copper based fungicide.

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