Colorado Tree Specialist

Preventive tree spraying serves a multitude of purposes- primarily, to combat both insect and disease pests, that more often than not, lead to the end of a tree’s lifecycle. We advise you to take immediate action and give us a call if the health of your trees seems to be declining or if there is an abundance of insects in close proximity to your landscape, which is why PTS provides free and thorough evaluations of the overall health of your trees upon request in both Vail and Denver. Subsequently, there are two types of tree spraying: preventive and curative.

Preventive tree spraying involves having a tree specialist apply either an insecticide or fungicide (and in some instances, both) to the tree prior to when the insect or tree disease is expected to be operating, effectively preventing, and/or minimizing, insect and tree disease damage.

Certain species of trees are more prone to insect infestation and tree disease, so it is imperative to diagnose the problem before it’s too late to repair the tree, and so an efficient spraying regimen can be administered. Before the process of tree spraying begins, one of Preventive Tree Spraying’s experienced Vail or Denver tree sprayers will inspect your tree for unwelcome pests or nutrients deficiencies in the soil. Similarly to all living organisms, trees require proper nutrients from soil in order to maintain health and grow.

Curative spraying, on the other hand, is when a tree specialist applies a tree spray after insects or diseases are already present, effectively preventing the pests from causing irreversible damage to your trees. Depending on both the species of trees being attacked, and the insects or diseases that are attacking them, PTS’ extremely experienced Vail and Denver tree sprayers will decide what tree spraying treatment will most benefit your landscape, when the tree spray should be applied, as well as how often it should be applied.

Preventive Tree Spraying’s arborists and tree sprayers utilize two natural gauges to establish when certain insects and diseases are most active: growing degree days and phenological indicators. Since the prevalence of insects is largely correlated with atmospheric temperatures, PTS’ tree specialists in Denver and Vail utilize a mathematical formula to calculate a specific range of temperatures as to when certain insects will be most vulnerable to treatment. Phenological indicators are also used to determine when certain species of trees and plants are in their developmental stages, which provides valuable insight as to when insects will be most active. The utilization of these two methods in conjunction give our tree specialists and arborists a more definitive understanding of when damage from insect pests is at its highest potential, so we know when to protect your trees best.



The primary cause of damage to trees and shrubs during harsh wintertime months in Vail and Denver is due to desiccation, or the process of drying out and losing moisture. In order to combat the loss of moisture to your landscape, PTS’ tree specialists can apply an anti-desiccant to your trees and plants to provide them with an extra layer of protection to minimize potential harm. Anti-desiccants behave like a layer of clothing for trees and shrubs, encompassing them in a waxy membrane that assists in retaining the moisture that is imperative to the health of the plant. As the temperature begins to warm up again as springtime approaches, the anti-desiccant will naturally and regularly start to deteriorate and your landscape will then begin its regular springtime growth.