White scales - house plants - Knowledgebase Question

Lake Zurich, Il
Question by amayaalfredo
February 13, 2010
How to get rid of them .insecticidal soap does not work.

Answer from NGA
February 13, 2010


Scales are unaffected by insecticidal soap because the insects have a hard outer coating that the soap won't penetrate. A better control method, although somewhat laborious, is dabbing each and every one of those scales with a Q-Tip dipped in rubbing alcohol. The alcohol dissolves the protective outer covering and the insects die. A few days after treatment they should be all dried out and you can scrape them off the plants with your fingernail or a toothpick. Be sure to monitor your plants closely for a second generation of the pests and treat as necessary. Good luck with your houseplants.

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