Climate factors that affect trees include temperature, precipitation, sunlight, and wind.

The other limiting factor is a dry climate, affecting trees more than grassland plants, which hoard water.

The virus affects stone-fruit trees, including peaches, plums and apricots.

Leafy mistletoe can adversely affect trees growing in urban environments and in forests.

In 2001, the town was noted as having trees affected by Dutch Elm Disease.

Although the blight also affected European trees, they were more resistant and more easily treated.

Workers at the industry's central research unit wanted to determine how high-voltage transmission lines and smoke from power stations affect trees.

Thus galls prevent twig growth and, if they are abundant, may affect entire trees.

Lighter Snow Helped But the storm affected trees almost exclusively in the lower regions.

The disease does not tend to affect older trees.