Answer: In addition to the two pests you mentioned, the boxwood mite is also fairly common and of the three it is the one more likely to cause bronzing of the foliage -- although I don't think I would call it red. Virginia Cooperative Extension provides some good boxwood information here http://www.ext.vt.edu/pubs/envirohort/426-603/426-603.html#L... (Boxwood in the Landscape) and some more specifics on boxwood pests here http://www.ext.vt.edu/departments/entomology/factsheets/boxm... including photos. Unfortunately, based on your description I can't make a diagnosis of the particular problem you are seeing.
It is important to first specifically indentify the pest and then determine not only which control to use but also the correct timing to use it. Some insects can only be controlled by spraying at a specific time in their life cycle and in many cases two carefully timed applications are needed in order to kill not only the intitial generation of adults but also the remaining generation that hatches later. You might wish to contact your local County Extension (301-590-9638) to see if they can help you identify the pest and suggest the appropriate control measures for it.
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