Over 250 million ash trees have been killed by the emerald ash borer. Mile High Tree Care has the cure… By the time you finish reading this, 6.3 ash trees will have died due to widespread EAB infestations. M ost of us are unaware of what type of tree has been living on our front… Read more »
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Emerald Ash Borer Detected in Colorado
As you may have heard, the Colorado Department of Agriculture announced Friday that emerald ash borer (EAB) has been confirmed to be present in Colorado. The specific detection was in Boulder. If you are not aware of emerald ash borer, it is arguably the most devastating invasive insect to have breached the North American shores… Read more »
Fireblight
Fireblight is a bacterial disease spread from tree to tree during blossom season by pollinating insects, birds, and raindrops. Fireblight infects apple trees, ornamental crabapple trees, pear trees, mountain ash, cotoneasters, and other various ornamental trees. Symptoms Symptoms of fireblight are die-back of infected branches from the outer tip inward. The leaves appear to have… Read more »
Canker Disease
Cankers are a fungus disease caused by a number of different pathogens and attack many varieties of trees. The following are general diagnosis and treatment practices. Symptoms The disease is usually inconspicuous at first but once it gets started it first kills scattered twigs and then proceeds rapidly. Cankers form in all sizes and ages… Read more »
Spider Mites of Evergreens
The spruce spider mite is one of the most damaging pests of spruces and many other conifers. These mites suck sap from the undersides of the needles. The green pigment disappears, causing a stippled appearance. Spider mites first appear between april and june. A complete generation may be produced in only seventeen days so mites… Read more »
Elm Leaf Beetle
Elm leaf beetles feed on siberian or Chinese elms. The adults lay yellow egg masses on the bottom of the leaves. The first generation emerges approximately the first or mid part of june. The eggs hatch and the larvae feed on the leaves leaving a brown area between the leaf veins. The second generation hatches… Read more »
Aphids
Aphids are an insect that attack a wide variety of trees and shrubs. Aphids are commonly found on ash, elm, walnut, willow, cottonwood, aspen, apple, linden, snowball bushes, and many other ornamental trees and shrubs. Aphids first start to appear in spring to early summer, and can reproduce quickly depending on environmental conditions. An aphid… Read more »
Ash Borers
On the front range the ash borers attack green or white ash trees, european mountain ash, and lilacs. The larvae bore into the wood of the host plant, creating holes in the trunk and main crotch area. This leads to swelling and cracking of the bark. Die back of specific branches are then observed in… Read more »
IPS Engraver Beetle and Mountain Beetle
The above two species of insects attack and kill pine trees and other species of long needle evergreen that have been planted or are naturally grown in a landscape setting around homes. The IPS beetle attacks spruce and pine trees of various sizes in the spring and has multiple flights throughout the season. The mountain… Read more »
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