Updated: June 30, 2023

Spathiphyllum, commonly known as the spath or peace lily, is a popular houseplant known for its beautiful flowers and lush green foliage. However, like any other plant, spathiphyllum is susceptible to various pests and diseases. One common problem that many spathiphyllum owners face is the presence of scales on their plants. Scales are small, oval-shaped insects that attach themselves to the leaves and stems of plants, sucking out the sap and causing damage. If left untreated, scales can weaken the plant and eventually kill it. In this article, we will discuss how to get rid of scales on spath plants and prevent future infestations.

Identifying Scales on Spath Plants

Before we dive into the methods of getting rid of scales, it is important to be able to identify them correctly. Scales are tiny insects that have a protective shell-like covering over their bodies, making them appear like small bumps or scales on the plant’s surface. They can be black, brown, white, or even translucent in color. If you notice these small bumps on your spathiphyllum’s leaves or stems, it is likely that your plant has a scale infestation.

Manual Removal

The first step in getting rid of scales on your spath plant is manual removal. You can use a soft cloth or a cotton swab dipped in rubbing alcohol to gently wipe off the scales from the affected areas. This method works best for small-scale infestations or when the scales are concentrated in one area of the plant. Be sure to dispose of the removed scales properly to prevent them from spreading to other plants.

Insecticidal Soap

For larger infestations or if manual removal does not completely eliminate the scales, you can use insecticidal soap. Insecticidal soap is a safe and effective treatment for scales and other soft-bodied insects. Simply dilute the insecticidal soap according to the instructions on the label and spray it directly onto the affected areas of your spath plant. Make sure to thoroughly coat both the upper and lower surfaces of the leaves and stems. Repeat this treatment every 7-10 days until all signs of scales are gone.

Horticultural Oil

Another effective treatment for scales on spath plants is horticultural oil. Horticultural oils work by suffocating the scales, ultimately killing them. Like insecticidal soap, horticultural oil should be sprayed onto the affected areas of your spath plant, covering all surfaces. It is important to note that horticultural oil should not be used when temperatures are above 90°F (32°C) or during periods of drought stress, as it can cause damage to the plant. Follow the instructions on the label for proper application and repeat as necessary until the scales are eradicated.

Neem Oil

Neem oil is a natural insecticide derived from the neem tree. It is known for its effectiveness in controlling a wide range of pests, including scales. Neem oil works by disrupting the growth and development of insects, eventually leading to their demise. To use neem oil on your spath plant, dilute it with water according to the instructions provided and spray it onto the affected areas. Repeat this treatment every 7-14 days until the scales are completely eliminated.

Preventing Future Infestations

Once you have successfully eradicated scales from your spath plant, it is important to take preventive measures to avoid future infestations. Here are some tips to help you keep your spathiphyllum scale-free:

  1. Inspect new plants: Before bringing any new plants into your home, thoroughly inspect them for any signs of pests or diseases, including scales. Quarantine new plants for a few weeks to ensure they are pest-free before placing them near your other plants.

  2. Maintain proper hygiene: Regularly clean your spathiphyllum’s leaves with a damp cloth to remove dust, debris, and any potential hiding spots for scales. This will help keep your plant healthy and less susceptible to infestations.

  3. Monitor humidity levels: Scales thrive in dry conditions, so it is important to maintain adequate humidity levels around your spath plant. You can use a humidifier or place a tray filled with water near the plant to increase humidity.

  4. Avoid over-fertilizing: Over-fertilization can weaken plants, making them more susceptible to pests and diseases. Follow the recommended fertilization schedule for your spathiphyllum and avoid using excessive amounts of fertilizer.

  5. Regularly inspect your plants: Keep an eye on your spathiphyllum and other houseplants for any signs of pests or diseases. Early detection is key to preventing infestations from spreading and causing extensive damage.

By following these preventive measures and taking immediate action at the first sign of scales, you can ensure that your spathiphyllum remains healthy and free from these pesky insects.

In conclusion, scales can be a nuisance for spath plants, but with the right treatment and preventive measures, you can effectively get rid of them and keep your plant thriving. Remember to identify scales correctly, manually remove them if possible, and use insecticidal soap, horticultural oil, or neem oil for larger infestations. By maintaining proper hygiene, humidity levels, and regular inspections, you can prevent future infestations and enjoy the beauty of your spathiphyllum for years to come.