I thought this Q+A dialog would be of interest:

There has been quite a surge in interest in trunk injections to treat a variety of disorders and ailments of trees. What type of benefit does an organic treatment have that trunk-injections do not?
I realize the one most glaring benefit is the absence of drilling into the trunk but, are there similar benefits to the tree's nutritional up-take?



Robert,
Good question and thanks for asking. First of all, no trunk injection program that I'm aware of can offer Nutritional Calories in the form of a complete balanced Protein. No injection program can inoculate the foliage of the plant/tree with beneficial microorganism. No injection program can inoculate the tree or landscape plants root system with beneficial microorganisms and in particular the mycorrhizae spores and tissues. No injection program can provide a significant volume of biologically viable humus to the soil. No injection program can contribute a significant volume of plant available N-P-K major nutrients without harming the tree. No injection program can offer a foliar uptake of Trace Minerals chelated with Humic substances such as Fulvic acid. No injection program can improve the health of the soil and therefore cannot improve the health of the tree on the long run. And finally but probably not the last, no injection program can invade the living tissues of the tree without harming it. There are organic way to do all of these.

"Injecting a tree with chemicals to combat poor health, insects and disease is like taking an aspirin for a headache caused by a brain tumor. You are only treating a symptom not the cause".

Good info there, Tony

_________________
Shepherd of the Trees
It is not our part to master all the tides of the world, but to do what is in us for the succor of those years wherein we are set, uprooting the evil in the fields we know so that those who live after may have clean earth to till.

Excellent answer, Tony! Thanks very much. I hope everyone reads this, especially those tree care people who don't yet get it and are not yet organic.