AvoJect tree trunk injections are an effective tree trunk injection tool for delivering plant protection material.
HiPK A systemic fungicide for the control of phytophthora and pythium root rot in avocado trees. This soluble concentrate contains 400g/litre phosphorous acid as mono-and di-potassium salts.
Tree trunk injection is a method of delivering pesticides, fertilizers, or other substances directly
into a tree's vascular system through the trunk. Here are some benefits of tree
trunk injection:
- Precise targeting: Tree trunk injection delivers substances directly into a tree's vascular system, ensuring that the substance reaches the intended target quickly and accurately. This method also minimizes the risk of drift or run-off, which can occur with other application methods.
- Reduced exposure: Tree trunk injection reduces exposure to people, pets, and the environment, as the substance is contained within the tree and does not spread to surrounding areas. This can be particularly beneficial for areas where other application methods, such as spraying, are not practical or safe.
- Long-lasting effects: Tree trunk injection can provide long-lasting effects, as the substance is absorbed and distributed throughout the tree's vascular system. This can be particularly beneficial for managing chronic diseases or pests, or for providing long-term nutrition to the tree.
- Minimal damage: Tree trunk injection minimizes damage to the tree, as it does not require drilling or other invasive methods. This can be particularly beneficial for older or more delicate trees that may be sensitive to other application methods.
- Cost-effective: Tree trunk injection can be cost-effective in the long-term, as it can
reduce the need for repeated applications and other management methods. This can be particularly beneficial for larger trees or for managing chronic diseases or pests.
Overall, tree trunk injection can be a safe, effective, and
precise method for delivering pesticides, fertilizers, or other substances to
trees, with minimal exposure and damage to people, pets, and the environment.
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What is Phytophthora dieback?
Phytophthora dieback is a plant disease caused by the Phytophthora fungus, which affects a wide range of plant species, including trees, shrubs, and ornamental plants. The disease can cause significant damage to affected plants and can even result in death.
The Phytophthora fungus attacks the roots of the plant, which can lead to root rot and reduced nutrient uptake. As the disease progresses, it can cause symptoms such as leaf yellowing, wilting, and dieback of branches or the entire plant. In some cases, the disease may cause blackened or discolored bark or a "bleeding" sap from the trunk of the affected plant.
Phytophthora dieback is often spread through soil or water, as the fungus can survive in moist soil for extended periods of time. The disease can also be spread through contaminated equipment, such as pruning shears or machinery.
Preventing the spread of Phytophthora dieback requires proper sanitation practices, including cleaning and sterilizing tools and equipment between uses, avoiding movement of soil from infected areas, and avoiding planting susceptible species in areas where the disease is known to occur. Fungicides can also be used to treat infected plants, although prevention is generally considered to be the most effective method of controlling the disease.
Overall, Phytophthora dieback can be a serious threat to plant health and requires careful management to prevent the spread of the disease and minimize damage to affected plants.
Symptoms of infection can take months and up to years to fully express:
- Leaves become smaller than normal, green, yellow and brown at the tips
- Leaves wilt during the heat of the date
- Defoliation
- Branches begin to fail to produce leaves (this is known as dieback)
- Reduced crops of very small fruit
- Reduced canopy growth and sparse canopy, thinning from the top
- White feeder roots become brownish/black
- Trees generally die or become unproductive within 3-5 years
When should I inject?
Low Pressure HiPK injections should only be applied when leaf flush has hardened and roots are actively growing. There are 2 windows where injecting can take place, spring and autumn.
There is only a small window of opportunity for injecting in spring as fruit growth occurs soon after the root flush and phosphonate will most likely travel to the flowers and any sizing fruit. The timeframe for application during spring is only 2-3 weeks long. DO NOT apply injections less than 6 weeks prior to flowering.
The main application window is in autumn and is about 8 weeks long. Autumn application can result in high phosphonate root concentrations which ensures root protection for a longer period. The higher concentrations provide good protection for the tree roots through the wetter winter period where there is an increased through from phytophthora, and results in a healthier root system going into the spring to support the critical flowering period where significant stress is placed on the tree.
Specific injecting dates vary due to weather conditions.
Why don’t we inject during flush?
When any chemical is applied to the tree it sinks to the part of the tree that is growing most actively at the time. If leaves are flushing the phosphonate acid will sink to the leaves and not the roots. Once spring/summer flush has hardened off competition from other organs in the tree are no longer dominant.
What dilution of the HiPK Solution should I use?
For trees aged 3-5 years,a 10% solution is reccomended.
For trees aged 5-10 years, a 15% solution is recommended.
For trees aged 10+ years, a 15% soultion for healthy trees and a 20% solution for sick trees is reccomended.
What should I do if my tree has multiple trunks?
If your tree has multiple trunks extending up from ground level, you need to treat each trunk that is supporting foliage.