WSU Extension Snohomish County The tree also makes a visual contribution year-round. Twigs and large branches die as a canker forms at the base of the tree. Some of the twigs may die above the swollen part, and the tree may be deformed if the infestation is heavy. Sunscald is caused by exposure of the bark to the winter sun. In the Midwest, this is a hardier substitute for the acid-loving flowering dogwood. These activities cannot be controlled. Squirrels typically strip bark in late winter or during periods with low acorn or seed production by trees (Fig 2). They enter trees through the bark. Photos can be attached directly to this reply using the Choose File tabs below. Wound Dressing. The dogwood larvae bore into the wood cambium. Knowing the species of your tree is crucial to deciding if a dogwood with peeling bark is in danger or if it is a normal occurrence. The foliage near the top of the tree begins browning and stops producing new buds and leaves. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture. To best help you, we would like to see photos of your tree and the damage that you are seeing. You may want to stop feeding the birds for a while or rake fallen acorns. Dogwood Borer Damage at the Base of Flowering Dogwood. In the early spring, beautiful flowers bloom consisting of four white, pink or red bracts with clusters of small yellow flowers in the center. Is there anything to be done? The idea behind this theory is that pregnant female squirrels late in their term, don’t eat. This theory looks at bark stripping which occurs during the dry months. Horizontal branches seem to be preferred, but have been known to strip the bark off of trunks too (Fig.3). If carefully treated, a mature Dogwood tree species, such as the Flowering Dogwood, may reach 40 feet in height. Twigs often clipped quite high on the tree, leaving 2-inch stubs. They are found throughout the area where flowering dogwoods are grown. Crown die-back is indicative of dogwood borer infestation. Black beardamage typically occurs in the Spring. Black bear damage typically occurs in the Spring. Is there anything we can do to discourage the critter and save our tree? Porcupines rely on tree bark as an essential component of their diet. http://snohomish.wsu.edu/. This usually occurs on the southwest side of the tree, thus sunscald is often called southwest injury. Powdery Mildew: Erysiphe pulchra (formerly Microsphaera pulchra) is the fungus that attacks leaf surfaces and tender shoots and causes powdery mildew. Woodpecker damage to trees can be a serious problem. Two outstanding characteristics are the four-petaled, white flowers that appear above the foliage in June and reddish-purple fall color. (Squirrel also chewed a wooden trellis.) The corky outer layer of a trees bark protect the tree from insects and diseases. Bridge grafting is the process of cutting, preparing and installing pieces of bark and wood vertically to connect the bark above and below the … Take care not to remove any healthy bark and expose more live tissue than necessary. The larvae of the borer lives in the cambial area and can kill branches or entire trees. Already we see that some leaves are stressed. Extension Educator, This work is supported by New Technologies for Agriculture Extension grant no. I do have to pay attention to the rope support and move it around every few years to avoid bark damage. Their holes are normally round, oval or semicircular and are found in a random pattern on the plant. Most flower and fruit, and have dazzling fall displays as the leaves change color. Damage to trees and shrubs caused by mammals and birds is fairly easy to identify. Woodpecker damage is sometimes confused with that of wood-boring beetles; however, woodpecker damage will not produce frass. This theory holds that squirrels are gnawing in search of the inner bark that would satisfy a particular nutritional need. Identifying the cause of the bark damage is fairly easy. Tooth marks will be horizontal. Damage will mostly occur on at the 3-5 foot level of the tree, typically conifers 15-30 years old. Stripped bark will lay on the ground. Lately some animal has been gnawing away the bark in large sections of the branches. First we suspected insect damage but the teeth marks made it definite it’s an animal. The more extensive the damage, the less likely the tree will survive, especially with smaller trees. Caught a squirrel chewing the tree. Dogwoods are native ornamental trees. Mostly confined to the winter sun periods with low acorn or seed production by trees Fig. Trees and shrubs caused by exposure of the dogwood borer larva under bark... 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