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Davey Resource Group
Cherry Bark Tortrix
The cherry bark tortrix (CBT) moths are major pests in the Pacific Northwest, where they affect rosaceous trees and shrubs. Affected plants include apple, crabapple, hawthorn, Mountain ash, pear and Photinia species. Prunus species are the preferred hosts.
Zimmerman Pine Moth
Zimmerman pine moths are 5/8” long with gray wings marked with mottled red and gray. Once a year, their larvae hatch and tunnel into trees, interfering with the tree’s sap flow and weakening them. Eventually, wind may break the weakened tops.
BOLO: Spotting Spring Invasives
Non-native plants may be sneaking onto your properties! Be on the look out for these characteristics to spot the sneaky invaders.
Spotted Lanternfly (SLF) Alert: What You Need to Know
Get the need-to-know facts on Spotted Lanternfly (SLF): what does spotted lanternfly look like, what states have spotted lanternflies, what trees are affected by spotted lanternfly, spotted lanternfly tree damage, what to do if you see a spotted lanternfly.
Algal Leaf Spot
Raised, wavy, cushion-like spots are symptoms of algal leaf spot, also known as green scurf. The spots are greenish, pinkish or grayish and less than 1 cm. in diameter. They may encircle a twig, creating a girdling canker.
Sudden Oak Death
Sudden Oak Death (SOD) is caused by a water mold called Phytophthora ramorum. The disease is common throughout California and Oregon.
Crape Myrtle Bark Scale
Crape myrtle bark scale (CMBS) is an invasive insect species that attacks crape myrtle trees. They are small, white or gray in color and have a felt-like appearance.
How Much Snow Can Tree Limbs Hold?
Vince Distrola of Davey's South Denver office talks about how much weight snow puts on tree limbs.
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