Top 10 Myths of Tree Care
… — Should you prune your trees in the spring? How deep must fertilizer be applied to reach the roots of your trees? Which species of trees should be topped to keep them from falling on your house? Most homeowners treasure the trees on their property but know little about how to care for them. Much of what you may have heard about tree care is actually incorrect, based on myths and misconceptions. Here are the Top 10 myths of tree care:
MYTH #1: When a tree is planted it should be securely staked to ensure the development of a stable root system and a strong trunk. Although it is sometimes necessary to stake trees to keep them upright and allow establishment, there are some adverse effects of staking. Compared to staked trees, unstaked trees tend to develop a more extensive root system and better trunk taper. Allowing a small amount of movement can help root and trunk development. Of course, the worst effect of staking is the possibility of trunk damage from the staking wires or ties. Staking materials usually should be removed after one year to avoid "girdling" the tree.
MYTH #2: Newly planted trees should have their trunks wrapped with tree wrap to prevent sunscald and insect entry. Studies using most common tree wraps have shown that they do not prevent extreme fluctuations in temperature on the bark. In some cases, the temperature extremes are worse. Also, tree wraps have proven quite ineffective in preventing insect entry. In fact, some insects like to burrow under it.
MYTH #3: Trees should be pruned back heavily when they are planted to compensate for the loss of roots.Tree establishment is best with unpruned trees. Although pruning the top can reduce the amount of water that evaporates from the leaves, the tree needs a full crown to produce the much-needed food and the plant hormones that induce root growth. The tree will develop a stronger, more extensive root system if it has a fuller crown. Limit pruning at the time of planting to structural training and the removal of damaged branches.
MYTH #4: When removing a branch from a tree, the final cut should be flush with the stem to optimize healing. First of all, trees don't "heal" in the sense that wounds on people heal. Our bodies regenerate tissues in much the same form of the tissues that were removed (to a limited extent). Trees compartmentalize wounds, generating woundwood over the wounded area. Flush cutting removes the "branch collar," creating a larger wound than if the branch were removed outside the collar. Also, it is likely that some of the parent branch tissue will be removed. The spread of decay inside the tree is greater with flush cuts.
MYTH #5: Pruning wounds greater than three inches in diameter should be painted with a wound dressing. Research has shown that the common wound dressings do not inhibit decay, do not prevent insect entry, and do not bring about faster wound closure. In fact, many of the commonly used dressings slow wound closure.
MYTH #6: Certain fast-growing, weak-wooded trees, such as silver maple and Siberian elm, should be "topped" to make them less hazardous in the landscape. While topping these trees may reduce the potential hazard at first, they will likely be more dangerous in the future. Topping stimulates growth of twigs below the cuts. Growth of many vigorous shoots leads to branches with weak attachments. Also, decay spreads inside the stubs and branches that were topped. Within two to five years after topping, the tree will have regained its height, but will be more hazardous than before the topping. Besides, topping makes trees ugly. Alternatives to topping include thinning, cabling, or removal and replacement with a more suitable species.
MYTH #7: If certain species of trees are pruned early in the spring, they will "bleed," stressing the tree and causing health problems. True, some trees such as maples and birches will "bleed" or lose sap from pruning cuts made early in the spring. This bleeding does not hurt the tree, and the loss of sap is inconsequential. With a few exceptions, most routine pruning can be done any time of year. The worst time is just as the tree has leafed out in the spring. The best time is when the tree is dormant. To maximize flowering for the following year, prune just after bloom this year.
MYTH #8: The root system of a tree is a mirror image of the top. Many people envision a large, branching taproot growing deep into the soil. Actually, taproots are very uncommon in mature trees. If taproots do develop, they usually will be forced into horizontal growth when they encounter hard subsoils beneath the surface. The entire root systems of most trees can be found within three feet of soil. The spread of the root system however, can be very extensive, often extending two to thre times the spread of the crown.
MYTH #9: Trees require "deep root fertilization" to reach their root system. In most U.S. soils, the vast majority of trees' fibrous, absorbing roots are in the top eight inches of soil. Roots grow where conditions are best for root growth, where water and oxygen are available. When we place fertilizer twelve to eighteen inches deep in the soil, we are putting it too deep.
MYTH #10: When a tree has lost a significant portion of its root system such as in construction damage, the crown should be cut back to compensate for root loss. While this is a common recommendation, research has not supported it. Following root loss, unpruned trees seem to respond better than pruned trees. Obviously, any removal of branches will reduce the capacity of the tree to produce food in the leaves. Although the tree will probably lose some branches as a result of the root damage (if the tree survives the trauma), it is best to let the tree decide which ones. Thus, pruning should be limited to hazard reduction at first. Later, after the tree has responded to the damage, further pruning would be in order.
Get advice from an arborist - An arborist is a professional in the care of trees. A qualified arborist can give you sound advice and can provide the services your trees may need. Good arborists will perform only accepted practices. When choosing an arborist, look for ISA Certification and membership in professional associations and ask for proof of insurance. Be wary of individuals who go door-to-door offering bargains for doing tree work. Don't be afraid to check references. To find an ISA Certified Arborist, along with more tree care information, visit www.treesaregood.org.
Be an informed consumer - One of the best ways to be assured you are making wise decisions regarding your trees is to educate yourself on some of the basic principles of tree care. The International Society of Arboriculture offers a number of brochures designed to inform consumers about trees. For a free set, write to ISA at P.O. Box 3129, Champaign, IL 61826.
The International Society of Arboriculture (ISA), headquartered in Champaign, Ill., is a nonprofit organization supporting tree care research and education around the world. As part of ISA's dedication to the care and preservation of shade and ornamental trees, it offers the only internationally-recognized certification program in the industry. For more information, or to find a local ISA Certified Arborist, visit www.isa-arbor.com.
Moth Madness of Milford
(1) The Gypsy Moth (Lymantria Dispar) are back, not in the numbers of a few years ago, but their definitely getting a foothold. We found multiple pockets in almost every community and areas around Milford.
(2) The best control was the wet/cool weather patterns that caused a natural decline in them a few years ago. Unfortunately those weather conditions did not appear this year giving way to these aggressive eating machines
(3) Gypsy Moth are like most insects and hatch or emerge in accordance to Growing Degree Days (GDD). Timing is essential when controlling pests that damage trees, shrubs, crops, etc. Gypsy Moth are best controlled in the first instar or earliest hatching phase. But they will continue to hatch between 90 GDDs & 448 GDDs. This extended period of emergence causes trees to be eaten over several weeks of the growing season. Defoliation can cause severe damage and death of trees if not addressed.
(4) Economics in controlling GM is of great importance. The past few years has been a hard road to travel financially and this affects both state & federal governments as well as the private sector. Most people don’t want to deal with an additional bill in the mail for some “JAWS” like eating machine as the GM. But treatingnow to stop the spread of these pests will save most trees as tree removal costs are very high. The more GM you kill today, the less you will have to deal with next year. Each GM has the capacity to lay hundreds of eggs and populations blossom if left unchecked. Most birds won’t eat GM’s because of their spiny like hairs, thus leaving most control measures that don’t naturally occur up to man.
(5) After trees defoliate they drop in vigor and are affected for years, some of which never recover. GM spread in several ways, such as hitchhiking on nursery stock, vehicles, forest products, firewood and outdoor household articles like deck furniture. Trees in forest areas live in their own environment and may overcome defoliation stresses faster than those on lawned areas where leaves are raked up and natural fertilization does not occur. So feeding is an important consideration if your trees are hit by these damaging pests. One of the best root enhancers to use and invigorate GM damaged trees is Mycorrhizae, a natural fungal spore.
(6) Methods of control could include airplane spraying (that covers just the top crown), foliar spraying from the ground (covers the entire tree). Trunk Injection, (costly, but affective if done on time). Pheromone traps (to catch flying males which will fertilize next years egg masses)
(7) Who should you contact?
All pesticide treatments are best left to trained professionals. Licensed Pesticide Applicators are a must. A Certified Tree Expert, ISA certified arborist, Licensed Tree Expert, Master Arborist, are all well schooled in controlling GM and can also inform you of other damaging pests which may be on your property. Emerald Ash Borer, Asian LongHorn Beetle, Mites, Borers and Weevils are just a few of the pests that can be put in check before it is too late.
The Pocono’s are all about trees. Lose the trees, lose the Pocono’s.