Cankers

Canker-causing microorganisms often become established on dying branches before invading the trunk. Most cankers start from poorly healed branch stubs. (See illustration 24)

Splits

The bark often splits above and below poorly healed branch stubs. These splits are additional entry points for trunk-infecting microorganisms. (See illustration 25)

Hollows

Water often fills the hollows associated with very old branch stubs. Do not bore a hole to let water out of a hollow, because this will permit decay to spread into the healthy wood that surrounds the hollow. (See illustrations 26, and 27)

Flower and Fruit Bearers

Trees that bear flowers or fruit abundantly should be pruned with extra care as they develop. The tree shape that looks beautiful when the tree is young could spell disaster later on. This is especially true when young trees are released from the forest during house construction. When trees selected to remain in a new lawn are fertilized heavily or when the surrounding lawn is fertilized, low branches continue to grow. (See illustration 36)

Although this may look fine for a while, it can be the start of trouble, since low, heavy branches often split during storms. (See illustrations 36, 37, 38, and 39)



Proper care for trees with low, heavy branches should be undertaken while they are still young. With improper care, trees with low, heavy branches are bound for disaster. (See illustrations 40 and 41)

Clumps and Sprouts

Prune dead and dying sprouts from clumps. Select for dominant sprouts those that have well-healed branch stubs. (See illustrations 42, 43, 44, and 45)

Planning Ahead

Plan ahead to avoid wounds when planting trees in a yard. By planning ahead, it should be possible to plant a tree in a place where it will not receive wounds or require harsh pruning later on. Avoid planting trees in the paths of both present and potential wounding agents. (See illustrations 46 and 47)

Plan ahead to avoid wounds when converting forest trees into yard trees. Select only the most vigorous trees to remain. First, consider the condition of the branch stubs. Are they well-healed or not? Look for early signs of other troubles, such as poorly healed wounds and cankers. And when you do select some trees to remain, don't put in a path of trouble near them - like sidewalks, driveways, and dog houses.

How To Prevent Wound Problems - Part I

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