Answer: Cottony white masses could be mealy bugs, or you may have discovered a collection of spider eggs encased in protective webbing. Mealy bug insects are small pests covered with white cottony fluff. Large clusters can often be found on stems or the undersides of leaves of many plants. They are difficult to control, but you can wipe them off with a damp cloth or a dampened cotton swab. Control may not be necessary because the leaves of your hibiscus will eventually fall off, and you can gather and destroy them. Or, you can pick off the most infested leaves.
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