I have a Magnolia that I had to cut back severly last fall due to an infestation of a small critter that looked like very microscopic ants. I then sprayed what was left of the tree with an insect spray. Thought the tree would not survive that. It did come back and has developed some strong branches and many good size leaves. Some of the leaves are now turning brown and are dying. Although I water in that area, possibly it doesn't get enough water. I'd appreciate advice on what I might be able to do to save the new growth. Lynn James

Reply to post by Lynn James, on July 17, 2002 at 20:55:06:

First, I have no direct experience with a problem like what you are describing. The Southern Magnolias and Saucer Magnolias under my care in Northern California have never been devastated by any insect.
However, what you describe sounds to me like what is described at the site linked below.
As a note for future reference, you will likely get better help if you can describe the tree species, your location in the country, and any pertinent facts about the planting site. Size and age of tree, size of parts pruned, exact reason for pruning, etc.
Also, did someone else recommend that you prune and spray? Did anyone identify the target insect?
Did you prune on a recommendation to reduce the pest population, and spray upon qualified advice for a specific pest insect, using a recommended product and following application recommendations?

Reply to post by Mark Goodwin, on July 17, 2002 at 20:55:06:

The dead leaves might just be the sprouts that were not competitive with the others that came out after the hard pruning.
southern magnolias actually can be reshaped into a compact form quite easily, like many hollies. A hard pruning, leaving stubs (!), stimulates dense new growth. So if you wanted a smaller bushier tree you've got it.
Mark is quite right;identify the bug before spraying. use toxins only as a last resort; leukemia is not fun to have.