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Are household ingredients (e.g., liquid soap, baking soda, ammonia) effective as controls fungi and aphids? Several garden writers recommend their use.

Last Updated: January 25, 2012

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The use of household ingredients for pest control is illegal and a federal offense. The label is the law, and unless the pest to be controlled and a recommended dosage are on the label of the product, it is illegal to use as such. Even though baking soda has been shown effective for ball moss control, the manufacturer has not put it on the label, so we can't recommend it. Detergents can be as harmful to plants as they are helpful in killing aphids; concentrated spray will cause plant tissue to deteriorate. Insecticidal soaps such as Safers, with instructions on the label, are better choices. Mouthwash, disinfectants, and other such products are not effective and are not recommended.

When looking for the least offensive means for controlling insects or diseases, consider organic controls and integrated pest management.  Information on these options are available through your local Extension Service office.

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