Brain disorders can also have an effect on the display of delta waves. Parkinson's disease, schizophrenia, and narcolepsy are all characterized by changes in delta wave activity. Some drugs and chemicals have been shown to impact the brain's delta waves.
Pruning advanced ornamental trees. Now's the time... Generally speaking an ornamental tree is one that is grown for its decorative looks and not for food. Winter is the perfect time to prune deciduous ornamental trees, as their structures are dormant. Inside the tree though, important processes are underway.
When to Trim Weigela. It is best to prune weigela shrubs in the late spring after they have finished blooming. Trimming weigela bushes right after they bloom will keep you from inadvertently pruning off next yearâs flowers. This is because weigela bloom on wood that it is a year old.rimming Weigela to Control Size. It is common to prune weigela bushes in order to keep them a certain size. With this method of pruning weigela bushes, get a mental picture of how you would like the weigela to look like when you are done. Then, you can trim off branches as needed to create that shape.