Plants Affected: Found predominantly on boxelder but may be found feeding on maples and other plants. Symptoms: Boxelder bugs are black with orange borders on the wing covers. They do not cause damage to the plants associated with them. Their favorite foods is boxelder seed pods found on female boxelders. They do not bite people
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Plants Affected: Mostly on Siberian (or “Chinese”) Elm and Russian Olive, but American, English and other Elms will also be affected. Symptoms: Affected trees will show considerable die-back in the crown and branches. Upon closer inspection, sunken areas can be seen in the branches. These areas will often show a black “pimpling” appearance. In Russian
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Plants Affected: Aspen, cottonwood, poplar. Symptoms: Galls (swellings) in the new growth of branches give the branch a “knobby” appearance. The damage is caused by an insect. Life Cycle: Little is known about this insect but it is thought to infect the new growth soon after the buds break in the spring causing the resulting
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Congratulations to the Denver Water Board for recognizing the importance of caring for our urban forests! The Water Board is not only allowing the deep watering of trees, shrubs, and perennials, they are also widely advocating this process. Use soft spray wands, root feeders or drip systems, never allowing the water to run off the
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