Treatment for Trees with Insect Problems
Insects can be a major problem for trees. Some insects eat or suck leaves and some eat wood tissue. Many insects also introduce fungi into trees. Quite often, insects attack unhealthy trees when their immune system is low. However, some species of insects attack healthy trees of specific species, while termites will attack any type of tree at any time.
Examples of Trees Needing Treatment:
Ficus trees, fruit trees, palms, pine trees, exotic species, and unhealthy trees
Locations Where Treatment is Recommended for Protection:
Properties near slopes with trees, next to country parks and other unmanaged forests
When Are Insects Active in Hong Kong?
We reference the seasonal patterns of specific insects for specific tree species and carry out treatments to prevent infestation before it starts. This is the most effective strategy for controlling insect populations and reducing impact on the health of trees and vegetation.
The active insect season varies each year based upon the weather conditions. If spring starts early, insects also tend to start early. The best time for treatment is 1-2 months before spring. The second best time for treatment is immediately.
If treatment cannot be done during the recommended period between December and February, the second best time for treatment is immediately.
Some Specific Insect Problems That Require Treatment
Insects Introduce Fungi into Trees
Many types of boring insects, such as beetles and termites, introduce fungi into trees. After eggs hatch inside the tree and beetle larvae not only feed on wood tissue but also fungi that was left behind by the adult beetle. After the insects develop from larvae to adult, they carry the fungi on their exoskeletons in search of a new host tree. This continues the cycle as the adult insects introduce fungi into new trees.
When we treat for infestation by boring insects such as beetles and termites, we also consider treatment for fungal disease as these commonly occur together. If not treated early, this can lead to escalated tree health decline.
We Have Solutions for Insect Problems
Treatment Methods & Equipment
The treatment is injected straight into the tree’s trunk and the solution is taken up by the tree’s natural water and nutrient pathways and out to every part of the tree canopy.
This method is especially useful for trees where soil is inaccessible due to paved concrete around the trunk, for example, wall trees, trees growing in sidewalks, or trees with root-attacking fungi.
We utilise the soil injection method for various types of treatment applications for health improvement or fungi and insects prevention. This method of application is highly effective for introducing beneficial systemic treatments to tree roots for uptake into the tree. We are even able to treat trees that are almost entirely surrounded by concrete.
Bark & Foliar Spray
We use a special spray head that minimizes spray drift and maximises treatment coverage. This method of application is sometimes necessary depending on the type of issue we are treating. For example, certain types of termites primarily feed on the outer surface of trees.
Timing of Treatments
The various methods of treatment have varied periods of effectiveness. For example, foliar spray application may have immediate effects, but the effects don’t last as long. Soil injection or soil drench applications for systemic treatment may take a few weeks to go up into the tree, but their effects generally last for 1 year or more. Trunk injections, however, can produce rapid results and remain active for long periods of time.
The recommended treatment method is determined based on the season, tree species, tree health condition, and the targeted issue.
We Have Treatment Strategies for These Insects
Black Vine Weevil Larvae
Bronze Birch Borer
Elm Leaf Beetle
Pine Tip Moth Larvae
Psyllids (including Lerp Psyllid)
Asian Longhorned Beetle
Citrus Longhorned Beetle
Cottonwood Longhorned Borer
Eucalyptus Longhorned Borer
Royal Palm Bugs
European Red Mite
Twospotted Spider Mite
Camine Spider Mite
Southern Red Mite
Spruce Spider Mite
Rust and Bud Mite
Eastern Tent Caterpillar
White pine weevil
Pine wilt nematode