Scale Insects & Bromeliads

It was the perfect spring day in the garden, the sun was shining, and the birds were singing. Little did anyone know what lurked beneath the surface of the lush greenery. In the still of the night, a small army of scale insects had infiltrated the bromeliads, setting up camp and readying their assault on the plants. So, what are scale insects, and how do they affect bromeliads?

Scale insects are tiny, sap-sucking pests that feed on the leaves, stems, and even roots of plants, weakening them in the process. While scale insects can feed on a wide variety of plants, they are particularly drawn to bromeliads, as the confined environment of their leaves makes them easy targets.

Here, you will explore scale insects, their impact on bromeliads, and strategies for preventing and managing scale insect infestations.

Scale Insects & Bromeliads

What are Scale Insects?

Scale insects are tiny, sap-sucking pests that belong to the order Hemiptera. They are named for their hard, protective scales that cover their bodies, which can be either circular or oval in shape. Scale insects feed on the sap of plants, which can cause stunted growth, yellowing of leaves, and even plant death if left untreated.

Types of Scale Insects

  • Armoured Scale: Named for their hard, protective scales that do not move.
  • Soft Scale: Have a softer, pliable scale that can move slightly.
  • Crawler Scale: The juvenile stage of scale insects that are mobile and can spread rapidly.

Life Cycle of Scale Insects

  • Egg: The female scale insect lays her eggs under her protective scale.
  • Crawler: Upon hatching, the juvenile scale insects, called crawlers, are mobile and can spread to other parts of the plant.
  • Nymph: The crawler moults into a nymph and begins to feed on the sap of the plant.
  • Adult: The nymph moults into an adult scale insect and continues to feed, laying eggs and starting the cycle over again.
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Harmful Effects of Scale Insects on Plants

  • Stunted growth
  • Yellowing of leaves
  • Stickiness or honeydew buildup on leaves and surrounding surfaces
  • Mold and sooty mold growth
  • Plant death in severe infestations

How Do Scale Insects Affect Bromeliads?

Bromeliads are a group of plants that are native to the tropical regions of South and Central America. They are popular houseplants and are prized for their colorful foliage and showy flowers.

Unfortunately, bromeliads are also susceptible to scale insects, which can be a significant problem for these plants. Scale insects can infest the leaves and stems of bromeliads, feeding on the sap and causing yellowing, wilting, and even death.

In addition to feeding on the sap, scale insects can also produce a sticky, sugary substance known as honeydew. This honeydew can attract ants and other insects to the plant and can also promote the growth of sooty mold, which can further damage the plant’s leaves and stems.

Preventing Scale Insect Infestations in Bromeliads

Preventing scale insect infestations in bromeliads is key to maintaining healthy and attractive plants. Here are some strategies for preventing scale insect infestations in your bromeliad collection:

  • Practice good hygiene: Keep tools and surfaces clean and free of plant debris, which can harbor scale insects and other pests.
  • Inspect new plants carefully: When bringing new plants into your collection, scrutinize them for signs of scale insects or other pests before placing them near your other bromeliads.
  • Provide proper care: Bromeliads that are well-cared for are less likely to become infested with scale insects or other pests. Ensure that your bromeliads receive proper light, water, and nutrients.
  • Avoid overcrowding: Overcrowding can create a breeding ground for scale insects and other pests. Make sure to provide adequate space between your bromeliads.
  • Introduce natural predators: Consider introducing natural predators such as ladybugs, lacewings, or parasitic wasps to your indoor environment to help keep scale insects and other pests in check.
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How Do You Treat Scales on Bromeliads?

If your bromeliads become infested with scale insects, it’s essential to take action promptly to prevent further damage to your plants. Here are some strategies for treating scale insect infestations on bromeliads:

  • Physical removal: For small infestations, you may be able to remove the scale insects by hand, using a soft brush to scrub the affected areas gently.
  • Horticultural oils: Horticultural oils, such as neem oil, can be used to smother scale insects and their eggs. Be sure to follow the instructions on the product carefully, and apply the oil in the evening to avoid damage to the leaves from sun exposure.
  • Insecticidal soap: Insecticidal soap can also be used to kill scale insects, but be sure to follow the instructions carefully to avoid damage to the leaves.
  • Systemic insecticides: Systemic insecticides, such as imidacloprid, can be used to control scale insect infestations. These products are absorbed into the plant and provide long-lasting protection against scale insects and other pests.

It’s important to note that some of these treatments can be harmful to beneficial insects, such as pollinators and natural predators. Be sure to follow the instructions on the product carefully and take care to minimize harm to beneficial insects.

What are the most common insects that threaten bromeliads?

Bromeliad insect infestations: a detailed overview reveals the most common insects posing threats to these plants. These include aphids, mealybugs, scales, and spider mites. Aphids feed on sap, causing stunted growth and leaf curling. Mealybugs leave sticky white residue and weaken the plant’s vigor. Scales and spider mites damage foliage by sucking sap and forming webs. Vigilance is important to prevent infestations.

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Can a Bromeliad Recover from Scales?

Yes, bromeliads can recover from scale insects, but it is essential to take quick and appropriate action to ensure the health and survival of the plant. Scale insects feed on the sap of the plant, which can lead to yellowing, wilting, and even death of the plant.

To recover, the infested leaves must be removed, and the remaining healthy parts of the plant should be treated with a pesticide. It is also important to practice good hygiene and regularly inspect your bromeliads for any signs of scale infestation.

Preventing the infestation from happening in the first place will help ensure the health and longevity of your bromeliad plant. If the infestation is severe and has spread to the majority of the plant, it may be difficult for the bromeliad to recover. In such cases, removing the entire plant and replacing it with a healthy one may be necessary.


Scale insects can be a significant problem for bromeliad collections. By being proactive in preventing infestations, monitoring for signs of infestation, and treating infestations promptly, bromeliad enthusiasts can protect their plants and enjoy the beauty of these unique and interesting plants for years to come.

Bromeliads are beautiful, fascinating plants that can provide a pop of color and interest in any indoor or outdoor setting. With proper care and attention, bromeliads can thrive and bring enjoyment for years to come. However, bromeliads can be vulnerable to infestations of scale insects, which can cause significant harm to these plants.

By following the strategies outlined in this article, bromeliad enthusiasts can protect their collections from scale insect infestations and keep their plants healthy and attractive.



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