Answer: Congratulations on doing such a great job with the gardenia -- they are not easy to keep under normal household conditions! Unfortunately, based on your description I am not certain which insect is infesting the plant. I would suggest you quickly take a sample to your County Extension (560-4150) for specific indentification and suggested controls. In the meantime you might try dislodging them with a good spray of tepid water -- but take the sample first.
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