Auxins. NAA, 2,4-D, ... Anyone use it?

gsward

Has anyone had any experience using natural or synthetic auxins like NAA, or 2,4-D for trees?

When should a tree receive a synthetic auxin? Is it best soil drenched, injected, or foliar applied?

How often should a tree receive synthetic auxins?

Which is the best synthetic auxin to use and which dosage is best?

If a tree is pruned does the tree make its own auxins? So would pruning be enough to get more auxins into the tree?

Will extra auxins help a sickly tree to recover faster?

Are the results noticeable, and worth the treatment?

Victor Lindsay

Well first off, here in the USA 2,4-D is a herbicide...not good for trees.

Now auxin is a plant hormone or substance that promotes or regulates the growth and development of plants; it is produced at sites where cells are dividing, primarily in the shoot tips. It's also known to be important in root development. Conversely, cytokinin is produced in the roots and is instrumental in shoot initiation and growth.

Their are synthetic forms of auxin sold, but i've never used them. I would think they would work. Both auxin and cytokinin work together in a delicate balance, so to upset that balance may create problems...I don't know.