Most Common Hoya Heart Plant Pests:
Identification and Treatment Guide

Hoya heart plants, also known as Hoya kerrii or sweetheart plants, are popular houseplants known for their heart-shaped leaves. These plants are generally low-maintenance and easy to care for, but like any other houseplant, they are susceptible to various pests. In this article, we will discuss the most common pests that can affect Hoya heart plants and provide a comprehensive identification and treatment guide.

Aphids

Aphids are small, pear-shaped insects that can be found on the undersides of leaves and along the stems of Hoya heart plants. These pests feed on the sap of the plant, causing leaves to curl, wilt, and turn yellow. Additionally, aphids secrete a sticky substance called honeydew, which can attract ants and promote the growth of sooty mold.

To control aphids on Hoya heart plants, start by removing heavily infested leaves or stems. Then, wash the plant thoroughly with a mixture of mild soap and water to remove any remaining aphids. If the infestation persists, consider using an insecticidal soap or neem oil spray to kill the pests.

Mealybugs

Mealybugs are soft-bodied insects that resemble tiny cotton balls. They typically congregate in hidden areas such as leaf axils and along the stems of Hoya heart plants. Mealybugs feed on plant sap and can cause stunted growth, leaf yellowing, and wilting.

To eliminate mealybugs from your Hoya heart plant, manually remove them using a cotton swab dipped in rubbing alcohol or soapy water. Pay close attention to hard-to-reach areas where mealybugs may be hiding. If the infestation is severe, consider using an insecticidal soap or neem oil spray to control these pests.

Scale Insects

Scale insects are small, immobile pests that attach themselves to the stems and leaves of Hoya heart plants. They have a protective shell-like covering that resembles scales and can be found in various colors, including brown, black, and white. Scale insects feed on plant sap and can cause yellowing leaves, stunted growth, and leaf drop.

To treat scale infestations on your Hoya heart plant, start by manually removing the pests using a soft brush or cotton swab dipped in rubbing alcohol. Be sure to target both the adult scales as well as their eggs. After removing the pests, wash the plant thoroughly with mild soap and water to remove any remaining scales. If the infestation persists, consider using an insecticidal soap or horticultural oil spray to control these pests.

Spider Mites

Spider mites are microscopic pests that are barely visible to the naked eye. They are common in hot and dry conditions and can severely damage Hoya heart plants if left untreated. Spider mites pierce the plant cells and suck out the sap, causing leaves to become speckled with yellow or white spots. They also produce fine webbing on the leaves and stems.

To control spider mite infestations on your Hoya heart plant, start by washing the plant thoroughly with a strong jet of water. This will help dislodge and remove the pests from the plant. Additionally, you can use insecticidal soap or neem oil spray to kill any remaining spider mites. Be sure to repeat the treatment every few days until the infestation is completely eliminated.

Fungus Gnats

Fungus gnats are small flying insects that resemble tiny mosquitoes. They are attracted to moist soil and can be commonly found around potted Hoya heart plants. Fungus gnat larvae feed on organic matter in the soil, including decaying plant material and roots, while adult gnats are mostly a nuisance.

To control fungus gnat infestations, start by allowing the top inch of soil to dry out before watering your Hoya heart plant. This will help prevent the gnats from laying eggs in the moist soil. Additionally, you can use sticky traps or yellow sticky cards to catch adult gnats and reduce their population. If the infestation persists, consider using a biological control agent such as Bacillus thuringiensis israelensis (BTI) to kill the larvae in the soil.

Conclusion

While Hoya heart plants are generally resistant to pests, they can still become susceptible to various insect infestations. By promptly identifying and treating these common pests, you can ensure the health and vitality of your Hoya heart plant. Remember to regularly inspect your plant for signs of infestation and take appropriate measures to control and eliminate the pests. With proper care and attention, your Hoya heart plant will thrive and continue to bring beauty to your home.