Pest Control Guide for Succulent Plants | Prevention, Early Detection, and Removal Methods

Succulents have a reputation for being hardy, but they are not immune to pest damage. In fact, their thick leaves are an ideal food source for insects, and damage can spread unnoticed. In particular, succulents kept indoors tend to suffer from poor air circulation, creating an environment where pests easily reproduce. Here we explain the most common pests affecting succulents and specific methods for prevention and removal.

How to Identify and Remove Scale Insects

The most troublesome pest for succulents is the scale insect.

• Identification
  • If you find white, cottony clusters on the base or underside of leaves, it is likely mealybugs.
  • Small brown or black bumps adhering to the plant indicate armored scale insects.
  • Both types feed on plant sap, and if left untreated, the entire plant will weaken.
  • Removal Methods
  • For small infestations, remove individual insects with a cotton swab dampened with alcohol. Isopropyl alcohol is effective.
  • For larger infestations, use an insecticide designed for scale insects.
  • Armored scale insects are covered with a shell, making insecticides less effective. Check the label for a product registered for scale insects (GF Ortran granules do not list scale insects among their target pests for ornamental flowers and foliage plants).
  • Post-Removal Care
  • Scale insects can return if eggs remain.
  • Repeat insecticide applications every two weeks for three applications after removal to break their life cycle.

Source: MAFF Pesticide Registration Database (GF Ortran Granules)

Spider Mite Control

Spider mites are tiny pests that tend to appear during hot, dry periods.

• Detection Tips
  • If you see fine white dots (feeding marks) on leaf surfaces, be alert.
  • As damage progresses, entire leaves become pale or faded.
  • If you see web-like strands, the infestation is quite advanced.
  • Using a magnifying glass, you can observe small red or yellow mites.
  • Removal Methods
  • Since spider mites are susceptible to water, first spray water thoroughly on both sides of the leaves.
  • Then apply a mite-specific insecticide (such as Mite Taro or Baroque Flowable).
  • Spider mites develop resistance to insecticides easily, so it is important to rotate different types of insecticides.
  • Prevention Tips
  • Regular misting is the most effective prevention method.
  • Especially during summer, mist the entire plant with a spray bottle every 2–3 days.
  • However, be careful to avoid excessive moisture, so perform this during times with good air circulation.

Root Mealybug Control

Root mealybugs are a type of scale insect that parasitizes roots and are difficult to detect above ground.

• Detection
  • If growth suddenly stops or the plant doesn't absorb water despite watering, suspect root mealybugs.
  • Remove the plant from the pot and inspect the roots; you will find white, powdery insects attached to them.
  • Make it a habit to check roots during repotting.
  • Removal Methods
  • Wash the roots thoroughly with water to remove the insects.
  • Dry the roots well and then repot (Ortran and Benica X Guard are granular products applied around the base of the plant; soaking roots in a dissolved solution is not indicated on the label).
  • Always use fresh soil. Old soil may contain remaining eggs.
  • Prevention
  • The basic prevention is to check the roots and use fresh soil at every repotting. If you use a pesticide, check the label for one registered for root mealybugs (GF Ortran granules do not list root mealybugs among their target pests for ornamental flowers and foliage plants).
  • When you purchase new plants, do not place them near existing plants; isolate and observe them for 1–2 weeks.

Source: MAFF Pesticide Registration Database (GF Ortran Granules)

Aphid and Slug Control

Although less common, these pests also require attention.

• Aphids: These tend to appear when flower buds emerge and congregate on new shoots and flower stems. Rinse them off with water or treat with insecticides. While folk remedies using diluted milk can be tried, results are inconsistent, so use a commercial insecticide if certain removal is desired.
• Slugs and Snails: These are prevalent outdoors during the rainy season. They are active at night and damage new shoots and leaves. Spread slug control products (such as metaldehyde-based formulations) around the base of pots, or set up beer traps to capture them. They often hide under the pot, so check regularly.

Building a Management System that Prioritizes Prevention

Prevention is far more important than treatment when it comes to pests and disease. By incorporating preventive measures into daily care, you can significantly reduce the risk of problems.

• Environmental Prevention: Ensuring good air circulation is the most fundamental and effective measure. For indoor management, using a fan is important; for outdoor management, maintaining proper spacing between plants is key. Additionally, using well-draining soil and avoiding excessive moisture prevents the spread of pathogens.
• Developing a Regular Inspection Habit: Get in the habit of observing the entire plant when watering. Check undersides of leaves, bases of plants, and gaps between new shoots—areas where pests commonly hide. Early detection of abnormalities minimizes damage.
• Quarantine Management of New Plants: Though often overlooked, this is an extremely important preventive measure. Manage newly purchased plants in a separate location for 2–4 weeks to prevent introducing pests and disease. Once you confirm there are no problems during this period, you can confidently integrate them into your collection.
• Preventive Use of Chemical Products: Regular monthly applications of insecticide and fungicide sprays during the growing season are also effective. However, prioritizing prevention through environmental improvement and avoiding dependence on chemicals is the best long-term strategy.

Annual Pest Prevention Schedule

Planned prevention is key to minimizing pest damage.

The first step in pest management is obtaining healthy plants. GrowerDirect sells plants grown by specialist growers under proper care, so the risk of introducing pests is low and you can shop with confidence. Even if problems arise, GrowerDirect's strength is that you can consult directly with the grower.