An introductory video 4 pruning plum and pluot. They are both sappy. Damage from direct intense sunlight can cause damage to exposed branches and the trunk and sap "bubbles". It doesn't have to be borers in these trees. Some plums are pruned to an open Center While others may be pruned to a modified central leader. Make sure that the structure of the tree has Strong Limbs are strong to support the fruit.
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