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Global Forests -
Little Known or Interesting Factoids About Trees and Tree Physiology

Karen Rockoff is the primary contact 
Jim is in the hospital & will take calls through Karen.

Karen Rockoff is the only certified arborist

Contact:  Cell: 830.955.0304
                     Karen Rockoff  Arborist  - TDA Certified

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Protect Your Trees
Protect The Environment 
Think Environment - Think Chemjet

 Texas live oak over four hundred years old; 
That Tree Is a non renewable resource of energy
Quote: An eight years old science student.

Environmentally Safe - Tree Injections
Tree Care Professionals are choosing injections that place the insecticides, fungicides and nutrients directly inside trees are being used more commonly as people become more concerned about the effects of pesticides in the environment.
Additionally, there are certain risks involved with a spray program that micro-injection users do not have. One of the major concerns for customers is the collateral environmental damage to plants, animals, and beneficial insects, on or near the plant site. The reason a spray program is so effective, is because it kills practically all critters. Unfortunately this includes baby birds, fish in nearby ponds, and beneficial insects that happen to be feeding at the time of treatment. Micro-injection only kills pests that are actively feeding on or in the plant. To the environmentally conscious customer, this is an important selling point.

It is also important to note that any time you spray, it is estimated that about 93% of the material is lost in evaporation, dripping, and drift, so most of the material is wasted. With all that wasted material floating around, there is a tremendous legal liability for chemical trespass. Then there is the problem of mixing the toxic chemicals. This is the area of largest concern and greatest exposure to the technician. In some of the worst cases the wrong materials are being applied.

Tree injections can be very effective against many tree health problems. They have several advantages over sprays and soil treatment: they use much lower volumes of material; the equipment needed to apply them is much simpler; they are very cost effective; an attractive feature of micro-injection is the low liability factor; there is no drift or chemical trespass liability;  While there is a lot of downtime on rainy days with spray programs; tree injections can be applied regardless of the effects of weather and even work better in windy situations because of increased transpiration and faster uptake; and the target chemical is applied directly into the tree vascular system for immediate effect response and where direct exposure is away from people, wildlife, beneficial insects and other non target organisms; The tree utilizes 100 % of the prescribed amount of product nutrient, fungicide or insecticide injected. Chemjet uses far less product to accomplish faster and more effective results.

Applying the Agri-Fos/Pentra-Bark, ( See Cautionary Statement ) for treatment to the bark makes the treatment available to the tree for more than six months. "Once applied, it doesn't rub off,"  The basal trunk spray application requires three to six weeks to translocate through the bark and to be assimilated by the plant before resistance to the pathogen is initiated. During that six months, the application product material on the trunk are being broken down before it is absorbed into the tree and is obvious not providing the tree, the full dosage amount intended. It is my understanding that, we are trying to control a pathogen that takes a tree down very quickly. This is where the Chemjet injection becomes far more effective tool in the fight against Phytophthora ramorum as the response effect starts immediately upon injection. All the while the trunk application is being exposed to the surrounding ecosystem; it then becomes part of the environment and all those trees are part of the habitat of small animals; squirrels, mice, birds, lizards, bees, frogs , snakes, spiders, other beneficial insects and microorganisms within those small ecosystem....    

Cautionary Statement:

Caution:   Potassium Phosphite is relatively benign, but the Pentra-Bark compound it is typically mixed with, can irritate the lungs and the skin as well as cause nausea and head aches.  Avoid "over spray" and heed the manufacturers instructions on wearing protective equipment.  "REMEMBER"..... PENTRA-BARK  IT IS A PENETRANT...... AVOID ALL CONTACT TO YOUR SKIN. 

The basal trunk application requires larger volumes of the Potassium Phosphite /Pentra-Bark mix and it must cover a larger area of the trunk 8 or 9 feet high in-order to supply a sufficient amount of chemical and perform similar or equivalent results. Whereas the injection application provides environmentally safe and effective results. It is certainly not a very efficient method of transfer through the bark and this application leaves a great deal to be desired.

Tree injections are applied into trees in ways that place the target material beneath the bark and into the tree’s water conducting system or sapwood, with the flow of water distributing into the tree's crown due to the evaporation through the leaves. Since the sap of the tree carries the product material, it generally moves upward, not downward.  Movement downward occurs only when the water column in the tree is broken by air that is allowed into the tree during drilling. This movement downward is not extensive and should not be counted on to provide significant control below the injection site. (1) {Foot Note} 

The greater percentage of water flow in the ring porous trees  (2)  such as oaks, elms, and ashes occurs in the outermost growth ring, with the next one or two rings able to transport only very small amounts. Other broadleaf trees use the outer two or three growth rings somewhat more equally. When the chemical product is injected, most of it moves quickly into the crown (XMS .. Xylem Mobile Systemic) to mix with the solutes and then to all parts of the tree via the phloem, wherever it is needed. In Ring porous trees, if the hole is too deep the pressure of the injection will push some of the product into the inner growth rings where it will stay and not be used.

The optimum time for injection, is the early spring, following bud break, full leaf expansion and may continue for the entire growing season. Injections are best applied from early morning until about mid day, while the temperatures are relatively cooler. Transpiration PULL (3) and uptake will stop during the heat of the day, and will resume in the cool of the evening. Uptake is also relative to the air temperature, soil moisture, humidity and the condition of vigor and health of the tree. Avoid treatment when temperatures are very hot or very cold.

Chemical companies are producing better products, with priority consideration for the environment first and better suited for micro-injection applications, thus providing much longer lasting residual time for as much as up to two to three years and at the same time providing more effective results to improve the trees chances for greater survival.

Every injection site causes an injury during application and to limit this damage and allow faster recovery, drill small and shallow holes, thus resulting in faster wound closure usually within a few short weeks. Trees should not be injected no more that once a year. However, for Sudden Oak Death, the second application should follow within six month and with subsequent injection on an annual basis. At the same time, trees show no long term damage after more than twenty years of repeated annual injection and continue to demonstrate vigor and good health.

With strong emphases on the environment. Control sanctions on chemicals, application methods of plant protection will become more severe in years to come. It is this new public awareness for the environment, that will demand and dictate, the use of better chemical products and application methods in the treatment and welfare for trees, the environment and people.

Treat healthy high risk trees within 200 feet of the infected center. (4)  It is also recommended to treat high value landscape trees 300 to 400 yards beyond the infected centers. Normally, it is not recommended to treat your trees in non-infected areas. However, if your trees are disease-free, the best way to keep them healthy is to avoid introducing them to the pathogen and a preventive treatment will maximizes your trees resistance. It is the best choice cost wise, than the ultimate removal expense of your high value landscape trees.

1):  Potassium Phosphite is highly mobile in trees due to the lack of one oxygen molecule and will move bi-directional in both the vascular and the phloem systems providing the tree with immediate response.

2): The rate of transpiration of broad-leaved trees is several times greater than that of evergreens. Birch, Oaks and Ash have a particularly high rate of transpiration. For example, water movement in feet per hour in ring porous trees are: oak = 92, ash = 85, hickory = 62, elm = 20. 

3): This transpirational "pull" on the water from transpiration is increased as a result of cohesion and adhesion of water molecules, as described in the “Cohesion-Tension Theory”                                                               

4); The treatment schedules should be timed in the spring or fall and follow the initial treatment six months later. Thereafter every subsequent year.


Trees can't protect themselves,... People can.
Trees can't move for better living conditions,... People can. 
Trees can't prevent pollution,... People can.
Trees by themselves can't move during their lifetime,... People can.

People can't produce oxygen,... Trees can.
People can't filter noise,... Trees can. 
People can't cool the globe,... Trees can.

The Value of Trees

Trees are Beautiful.
Trees increase economic stability by attracting business and customers to communities.
Trees enhance neighborhoods  by adding beauty and softening the harshness of our environment.
Trees are essential the health of our environment and to our health.
Trees are a critical part of the ecosystem.
Trees provide habitat for many species of wildlife and beneficial insects. 
Trees save energy by reducing the need for cooling and heating.
Trees reduce erosion by intercepting, storing, and using rainfall.
Trees have a positive effect on people - they can make us feel happy, connected with nature,
          and reduce  stress, and most important they restore our spirits.
Trees produce oxygen we breath, absorbs carbon dioxide produced from the combustion of various fuels

Saving the Environment Every Time !

So Easy To Use  -  Hands On Training


Disclaimer: This article may contain pesticide recommendations that are subject to change at any time. These recommendations are provided only as a guide. It is always the pesticide applicator’s responsibility, by law, to read and follow all current label directions for the specific pesticide being used. If any information in these recommendations disagrees with the label, the recommendation must be disregarded. No endorsement is intended for products mentioned, nor is criticism meant for products not mentioned. The Writer assumes no liability resulting from the use of these recommendations. The information given herein is for educational purposes only. Reference to commercial products or trade names is made with the understanding that no discrimination is intended and no endorsement is implied.   

Scenic Hills Nursery - WARRANTY DISCLAIMER : 

Tracking The Spread of Sudden Oak Death:
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Jim Rediker - Experienced Arborist, TDA Certified - Licensed Nurseryman - TDA Licensed Applicator Consultant

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Karen Rockoff is the primary contact 
Jim is in the hospital & will take calls through Karen.

Karen Rockoff is the only certified arborist

Contact:  Cell: 830.955.0304
                     Karen Rockoff  Arborist  - TDA Certified

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