Without written records or reliable eyewitness testimony would have to use an increment borer to be sure.

I, too, worry when someone is guessing about the dosage of a pesticide. It's dangerous for the applicator as well as for the environment. The responsible use of imidicloprid pesticides requires knowledge of the most effective timing as well as making certain that the dose will be correct. Another factor that worries me is that some insects are developing resistance to this class of pestides (neonicotinoids) . But the biggest headache is that these chemicals have proved to cause a population explosion of pests after the effects begin to wear away. This ends up causing increased problems....and more pesticides. I strongly advise that our original poster wait for several weeks to see if there are any positive results. By that time, the trees will be preparing for autumn. I also suggest that he/she call the toll free number found on every label to ask for advice. Know the identification of the pests and the measured circumference of each tree. Be honest with your particular dose. I'll bet that you get lots of help. I agree that the 'lint' insects are not whitefly but hackberry wooly aphids. You might not be observing or recognizing other pests, as well. Don't you think that it might be time for you to call on a professional? An ISA (International Society of Arboriculture) Certified arborist is required....not any 'tree guy '. One of the most effective control measures is horticultural oil applied in the winter. This treatment smothers the eggs of many pests, breaking the cycle. I doubt that any professional will spray acephate everywhere and Bt is useless on whitefly (or wooly aphids, for that matter).

No pruning because the plant hormones in the growing tips help grow new roots. No root stimulator because growing new roots takes time. When you water, make certain you apply it to the region of the original rootball. And you may have to do so daily. It may also help to rig temporary shade.

th102 now is not the ideal time to prune your tree. Having said that. It will still leaf out and produce fruit if you prune it now. The longer you wait the more sap will be flowing thought the tree and the tree will lose more of its energy due to losing more sap. Keep in mind that pruning while the tree is no longer dormant will be a shock to the tree. Thus it will likely appear to stop the active growing process for 1-3 weeks. Your fruiting and ripening cycle this season will also likely be delayed/slowed by roughly the same amount of time.