Two Common Species Recommended for Dormant Oil Treatments
Coming up in in late winter/early spring, many of our Castle Rock clients get a dormant oil treatment on their aspen or pine trees.
Given these are two key species in your environs, dormant oil treatments prevent needle scale on pine trees and oystershell scale on aspens.
Needle scale on pine treesThe scale is more easily controlled in early spring then any other time of the year. Typically a dormant oil treatment is done in mild, late winter weather (40 to 60 degrees) because discoloration and staining can occur on nearby trees when temperatures are higher.
“Pine needle scale is an elongate, white insect that attaches itself to the needles of several pines, notably mugho,” according to CSU.
Premature or abnormally large needle drop on you pines, especially mugho pines may indicate its presence.
Our staff sees this most commonly on aspen and have observed the tell tale oystershell pattern on stems and branches of ash trees. Oystershell scale is regarded as a tree killer due to the aspens susceptibility to disease once the scale has sapped its vigor.
Dormant oil is also effective is preventing elm scale on elm trees.
More common to our clients along the elm lined streets in Denver, elm scale will leave a stick honey dew which drips down from a towering elm onto you and your neighbors, parked cars and decks.
Are you’re trees struggling and you’re not sure what’s wrong? Contact us for a free quote.