Understanding Soft Scale Insects: How to Identify and Deal with Soft Scale Pests

Introduction to Soft Scale Insects

Soft scale insects are part of the family Coccidae and include many species that can infest both indoor and outdoor plants. Unlike their armored counterparts, soft scale insects have a waxy, rather than hard, covering. This type of scale can cause damage to plants by sucking sap, leading to various issues such as growth retardation and sooty mold development. Knowing how to recognize and deal with soft scale insects is crucial for gardeners and farmers.

Characteristics of Soft Scale Insects

Soft scale insects have specific characteristics that set them apart from other types of scale insects.


Soft scale insects are often round or oval, with a smooth or wrinkled appearance. Their color can vary widely among species, ranging from brown and yellow to black or even translucent.

Soft Body

The body of soft scale insects is often soft, not rigid like armored scale insects. This soft body is covered by a waxy secretion that can be separate from the insect’s body or partially fused with it.


Soft scale insects are typically small, with most species ranging between 1 to 5 millimeters in length.


Unlike armored scale, which is often immobile in adult stages, soft scale insects may retain some mobility even as adults.

Life Cycle of Soft Scale Insects

Understanding the life cycle of soft scale insects aids in their identification and control.

Egg Stage

Females lay eggs underneath their bodies, where they are protected by the waxy covering.

Nymph Stage

The nymphs, or crawlers, emerge from the eggs and may move to new feeding sites on the plant or even other nearby plants.

Adult Stage

As they mature, they settle into a feeding site where they continue to develop their characteristic waxy covering.

Plants Affected by Soft Scale

Soft scale insects have a wide host range and can affect many different types of plants.

Ornamental Plants

Many species of ornamental plants, such as roses, can be affected by soft scale insects.

Fruit Trees

Soft scale can infest fruit trees, including citrus, leading to reduced fruit quality and yield.

Indoor Plants

Houseplants are also susceptible to soft scale, particularly if they are stressed or improperly cared for.

Identifying Soft Scale Insects on Plants

Recognition of soft scale insects on plants requires careful inspection and awareness of their characteristics.

Visual Examination

Regularly examining the leaves, stems, and other parts of the plant for signs of soft scale can aid in early detection.

Presence of Honeydew

Soft scale insects excrete honeydew, a sticky substance that can attract ants and lead to the growth of sooty mold. This can be a clear sign of infestation.

Expert Consultation

If unsure of the identification, seeking expert consultation from local horticultural extensions or pest control professionals can ensure proper diagnosis.

Management and Control of Soft Scale

Control of soft scale insects requires a comprehensive approach.

Cultural Practices

Healthy plant care practices, including proper watering and pruning, can deter soft scale infestations.

Biological Control

Introducing natural predators like ladybugs can help manage soft scale populations.

Chemical Control

If infestations are severe, insecticides or horticultural oils specifically designed to target soft scale may be required.

Soft scale insects present a subtle but significant threat to various plants. Their unique characteristics, combined with their potential for widespread damage, make understanding and managing them vital for maintaining plant health. By being proactive and implementing a combination of cultural, biological, and chemical controls, soft scale infestations can be managed effectively, preserving the beauty and productivity of gardens and crops.