Sticky leaves can indicate a pest problem on your trees. The cause is aphids, small pear-shaped insects that feast on the saps and juices in the leaves. The aphids themselves rarely harm the tree, the issue is with the sticky "honeydew" they secrete. It creates the perfect breeding ground for powdery or downy mildew. The following guide can help you spot an aphid problem and provide tips for controlling it.
Some trees are more prone to aphid problems than others. Fruit trees, such as apple, cherry or pear, are especially susceptible, as are ashes and maples. Conifers aren't immune to aphids, but they are more resistant to disease damage than deciduous trees. For this reason, deciduous trees are the main ones to watch for infestation.
Aphids tend to congregate in clusters on the underside of leaves. They are usually green, yellow, brown, or black in color. They leave behind the sticky honeydew, which can attract ants into the canopy of the tree. Badly infested leaves may curl up and die. The leaves may also simply turn yellow and appear stunted. If mildew takes hold, a powdery gray or thick black mold may begin growing on leaves and stems.
There are several different ways to handle aphids. If a tree is large and otherwise healthy, a small aphid infestation isn't usually a concern. You may be able to get rid of a small population by simply rinsing the foliage off with a sharp spray from the hose. The following are a few more options for control:
Talk to a tree care specialist in your area for more help with controlling tree pests.Share
14 June 2016
I love and appreciate all of the trees around my home, but I do worry about what will happen during a strong storm. Will I get rudely awakened by by a tree crashing through the roof into my bedroom? Will a tree fall and take down the power lines that my family relies on each day to live our comfortable life? This blog will show you what you need to know before you go cutting down all of the trees on your property to maintain a safe living space and advice for picking and choosing the trees that will remain.