Landscape trees provide welcome shade, fruit, homes for wildlife, and even a place for kids to climb. But if the wood is damaged, disease-causing fungi can infect the tree. A number of fungal diseases decay wood in both tree branches and trunks, weakening and sometimes killing the tree. Wood decay can be hazardous when infected branches and trunks fall.
- Author: Igor Lacan
In the December 2013 issue of the Green Bulletin, we looked at “Pruning and Tree Physiology: The Bad and the Ugly” for pruning and maintaining ornamental trees as well as some pruning pitfalls. However, pruning can also be highly beneficial for many landscape trees. In this article I will review some approaches to pruning which either directly suppress pests or which maintain tree health, and because impaired health predisposes trees to a number of diseases, these pruning measures could thus be considered a part of an integrated pest management program.
Formative pruning: A young tree arriving from the nursery or...