Systemic Tree Implants

ArborCarbon are the Australasian distributor for the MEDICAP and PHOSCAP range of systemic tree care implants, which are designed to mitigate premature decline in trees due to various health disorders and injury.

Systemic tree implants were developed in the United States more than 40 years ago. Since that time these implants have proven to be safe and effective for the treatment of a range of tree health disorders. These implants are delivered directly into the tree and are designed to remain safely within the tree with the contents delivered systemically throughout the tree with sap flow.

The implant provides the tree with a slow release nutrient that benefits the tree over a longer period of time, with the aim of improving plant vigour and general health and condition.

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Slide from a presentation by ArborCarbon’s Dr Paul Barber in Warwick in the UK in 2015

Tree Implanting - drilling

Implants are very easy to administer

Implants are available in the following formulas, they can be used in combination with each other;

file-page1PHOSCAP (HIGH PHOSPHATE 0-50-30) is a special formulation of high water soluble phosphate, potassium and a range of trace elements designed to stimulate tree foliage. Provides phosphate for plant health and root enhancement, potassium for cell strength and rigidity, and essential trace elements to ensure a more complete nutrient feed. This implant treatment may be helpful to enhance protein and carbohydrate synthesis and aid in plant health tolerance to heat, cold and drought. Also reduces plant stress, enhances overall health and increases resistance to disease.


MEDICAP MD 121-4-4MEDICAP MD (12-4-4) A special blend of highly water soluble nutrients designed to stimulate tree growth including trace elements required for the production of healthy green foliage. Ideal for use on fruit, ornamental and native trees and designed to be effective for a number of years after a single application. Treatments may mitigate premature decline in health triggered by mechanical damage, sub-optimal soil conditions, disease or insect attack, waterlogging, drought or frost damage, transplant shock, or pruning shock.

file-page1 MEDICAP MN (MANGANESE) This formulation of manganese is ideal in trees where manganese deficiencies are difficult to control with soil or foliage application. Such manganese deficiencies are normally associated with calcareous, arid or sandy soil conditions. Trees most susceptible include maple, peach, ornamental cherry, citrus and a range of deciduous fruit.

file-page1MEDICAP FE (IRON) A unique formulation of water-soluble iron effective in trees suffering iron deficiency where application of iron to the soil or foliage is ineffective. Such iron deficiencies are normally associated with calcareous, arid, or sandy soil conditions. Trees most susceptible include a range of eucalypt species, pin and white oak, black locust, birch, liquid amber, pines, magnolia, bauhinia, dogwood, podocarpus, poplar, citrus, peach, pear, apple and avocado.


file-page1MEDICAP ZN (ZINC) These zinc implants are effective in trees where zinc deficiencies are difficult to control by soil or foliage application. Such zinc deficiencies are normally associated with calcareous soils and are common in citrus, peach, nectarine, eucalypts, avocado, walnut, pecan and other nut-producing trees.


For pricing or more information contact Paul Barber at ArborCarbon or phone +61 8 9467 9876

Benefits of urban trees – Infographic


Benefits of Urban Trees  infographic by the Food & Agriculture Organization of the United Nations (FAO).

“Large urban trees are excellent filters for urban pollutants and fine particulates. Trees can provide food, such as fruits, nuts and leaves. Spending time near trees improves physical and mental health by increasing energy level and speed of recovery, while decreasing blood pressure and stress. Trees properly placed around buildings can reduce air conditioning needs by 30% and save energy used for heating by 20–50%. Trees provide habitat, food and protection to plants and animals, increasing urban biodiversity…planting trees today is essential for future generations!”

Download: PDF version

Senseless felling of old Jarrah

Very few Jarrahs of this size exist now in the Perth urban area…

Today I went to visit the site a few minutes from me where a Jarrah (Eucalyptus marginata) possibly 500 years old or more, was felled for no good reason. This tree was nearly 2m in diameter at its widest point….that is over 6m around the base! It was a giant. Very few jarrahs of this size exist now in the Perth urban area….and I would say even in the world. This was a living link with the time of only indigenous occupation of this country.

Local residents who discovered the contractors cutting this awesome tree to the ground

Local residents who discovered the contractors cutting this awesome tree to the ground.

I met with the person who discovered the contractors cutting this awesome tree to the ground. I must say…it all sounds very dodgy and I’m afraid this practice is all too common in locations that are proposed for future development in WA. I’ve now seen it many, many times and I’m fed up.

Yes, the tree had bees in the hollows, however, these could have been removed without too much difficulty. I measured the approximate height of the tree…around 22 metres at best. Distance to the nearest fence or footpath around 24 metres. Even if it failed at the base it would not have made direct impact with anybody. It resides in a bush-land corridor where very few people would walk..and to top it off, at the base it the heartwood was almost defect free.

Yes, the tree was in decline as you would expect for a tree of this age….it is possible that the health of the tree had been previously impacted from construction of nearby houses and the road…but it was battling on.

This tree was nearly 2m in diameter at its widest point

This tree was nearly 2m in diameter at its widest point.

I’ve seen the main roads statement, and the arborist ‘report’….no arborist in his right mind conducting a risk assessment of this tree based on internationally recognised methods would ever condemn it. I can say this as I’ve learnt and become qualified and licensed in these methods.

This is senseless and begs the question as to the real reason this tree was condemned. People must be made accountable for this…….we, as members of this community, need to get tough on this. Perth has changed for the worse over the past 12 years I have been here…the green spaces and trees are disappearing fast, the water is drying up rapidly, our houses are getting bigger, our blocks of land smaller, our urban area hotter…this is all leading to a decline in our quality of life and will result in increased hospitalisations due to heat-related illness and reduced mental well-being.

We need trees and trees now need us…

Dr Paul Barber, ArborCarbon