Damage, symptoms and biology
Damaging winds are very common in Ontario and are one of the most important physical conditions that damage trees. All trees are susceptible to wind damage, especially those with shallow root systems. Wind damage includes defoliation, bending, breakages of branches and main stems, damage to roots and root collar caused by the rocking of the tree, and the uprooting of entire trees. Strong, prevailing winds can deform tree growth.
Wind damage can be lessened to some extent through the use of shelter belts, early thinnings, and short rotations. In commercial timber the economic impact of severe wind damage (blowdown) can be reduced through salvage operations. Salvage must start immediately, as numerous insects and diseases quickly attack dead and dying material lowering the quality of the timber. Salvaging down timber will also reduce possible fire hazards.
Canadian Forest Service Publications
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