Protecting Trees From Insect Pests
Trees are probably the most valuable part of our landscape. They shade our homes, reducing energy costs, and give our yards and neighborhoods that unique character that increases aesthetic appeal and property value. Trees also reduce erosion, buffer noise and provide habitat for wildlife.
Unfortunately, trees are often taken for granted and don't get the care they need to thrive. Often, this simply has to do with the size of the trees. They're so large, insect pests and other problems are difficult to recognize. Many of the most threatening insect pests, like borers and leafminers, do their damage out of sight. Once they're discovered it's often too late to save the tree. Even if a pest is discovered, control measures are usually difficult (and costly), often requiring the help of an expert with high-powered spray equipment.
So what can you do to protect your trees? First, make sure they get the routine care they need. Trees that are weakened or stressed due to improper care are more susceptible to pests. To keep trees healthy:
Deeply water during dry spells. Even large trees need sufficient soil moisture. Water deeply so the moisture reaches a depth of 2 to 3 feet. If you don't have an irrigation system, run a slow sprinkler or soaker hose under the canopy. Make sure to water all the way out to the drip line (the edge of the canopy) and slightly beyond. In the arid west, you may have to deep water at least once a month during summer.
Mulch. If possible, apply a 3- to 4-inch layer of organic matter on the ground beneath the canopy of the tree. A mulch will cool the soil and reduce evaporation.
Protect the trunk. Avoid hitting the trunk with lawn mowers or weed whackers. The wounds weaken the tree and provide entry points for insect pests.
Prune properly. Prune to enhance the shape and character of your trees. Don't make large cuts that leave branch stubs, which ruin the natural form of the tree and result in weakly attached branches.
Look for signs of trouble. Dying limbs, yellowing foliage, wilted leaves, and oozing wounds are signs of problems.
Protect against known pests. If you know trees in your area are threatened by a serious pest, like borers, beetles or scale, or if your trees already have a light infestation, apply Bayer Advanced™ Tree & Shrub Insect Control Concentrate. It's easy to use: Just mix with water in a watering can, then pour around the trunk of the tree. There's no messy spraying. Once applied, it systemically moves into the branches and foliage, and protects against insects for up to 12 months. Follow label instructions carefully.
Get expert help. If you need help identifying tree pests or with providing proper care, consult a certified arborist. You'll find them listed in the yellow pages of your telephone book.
Products Mentioned In This Article
Bayer Advanced
