Application Techniques For Plant Health Care

By August Hoppe

Keeping trees and shrubs healthy is one of the more rewarding services that Hoppe Tree Service performs.   There are a multitude of different insects, diseases and stresses that can affect trees.  Depending upon the situation, there are a variety of different methods and techniques that can be used to care for trees.  Hoppe Tree Service Plant Health Care technicians are well versed in analyzing the needs of trees and determining the best application method to ensure good outcomes for your trees and shrubs.  We have a lot different tools in our arboricultural tool box!

Soil injection is a great way to deliver long lasting nutrients, or soil insecticide products right to the root systems of trees.   Products are mixed in a water based solution and pumped into the root zone using
 a pressurized system. Hoppe Tree Service uses this approach to perform fertilizer applications.  This treatment option provides a more even coverage than using tree spikes or granular products.  Soil injection also works well for delivering long lasting systemic control against pests that do their damage internally within the cambium layer of trees.  This includes insects such as bronze birch borer, plum, linden or emerald ash borer.


Trunk injections involve small injection sites drilled into the trunk of trees to deliver insecticides, fungicides or nutrients.  Trunk injections offer a stronger more direct way to get products into trees than soil treatments.  Injections take place at the cambium layer and then products are distributed throughout the vascular system of the tree.  Treatments work quickly and are long lasting. Trunk injections provide multiple season control and often work best for larger diameter trees.  Hoppe Tree Service uses trunk injection to fight against insects and nutrient deficiencies. Studies have continued to show that trunk injections can provide multiyear protection against Emerald Ash Borer.  Trunk injections can also be used to deliver fungicides that can protect against Dutch elm disease and Oak wilt Disease.


Foliar applications can be very effective at providing protection against fungus diseases that affect leaves and needles.  Common diseases such as apple scab disease on crab apple trees, and needlecast diseases on spruce trees are most often treated by using foliar applications.  Treatments are applied to the leaf/needle surfaces as a protectant prior to infection.  Treatments can wear off through the course of the season and are often reapplied with multiple applications through the course of the season.  

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