Most Common Sundew Plant Pests:
Identification and Treatment Guide

Sundews (Drosera spp.) are carnivorous plants known for their unique ability to attract, capture, and digest insects. They are fascinating additions to any garden or collection due to their striking appearance and intriguing feeding mechanisms. However, like all plants, sundews are susceptible to pests that can cause damage and hinder their growth. In this article, we will explore the most common sundew plant pests, how to identify them, and the best treatment options.

1. Aphids

Aphids are small, soft-bodied insects that feed on the sap of plants. They can quickly multiply and infest sundew plants, causing stunted growth and deformed leaves. Identifying aphids is relatively easy as they are usually found in clusters on the undersides of leaves. They come in various colors, including green, black, brown, or even translucent.

To treat an aphid infestation on sundews, start by physically removing the insects using a gentle stream of water or by wiping the leaves with a soft cloth dipped in soapy water. Alternatively, you can introduce natural predators like ladybugs or lacewings to control the population. In severe cases, an insecticidal soap or neem oil spray can be used as a last resort.

2. Fungus Gnats

Fungus gnats are tiny flies that lay their eggs in moist soil. The larvae feed on decaying organic matter and can damage a sundew’s delicate root system. Adult fungus gnats are attracted to damp conditions and can often be seen hovering around the plant’s base.

To control fungus gnats, ensure proper drainage by using a well-draining soil mix for your sundews. Allow the top layer of soil to dry out between waterings to discourage egg-laying by the gnats. Sticky traps placed near the plant can help catch the adult flies. If the infestation persists, consider using a biological control agent like Bacillus thuringiensis israelensis (BTI), which targets the gnat larvae without harming the sundew or beneficial insects.

3. Spider Mites

Spider mites are common pests that can wreak havoc on sundews. These tiny arachnids feed on the plant’s sap, causing yellowing leaves, webbing, and overall decline in health. Identifying spider mites can be challenging as they are barely visible to the naked eye. However, you may notice fine webbing on the leaves and small specks that resemble dust moving around.

To treat a spider mite infestation, start by washing the leaves with a strong jet of water to dislodge the pests. Increase humidity around the plant by placing it on a tray filled with water and pebbles. This will discourage mite reproduction and help the sundew recover. If necessary, use organic insecticidal soap or neem oil spray to control the population. Repeat treatments may be required to eradicate all mites.

4. Slugs and Snails

Slugs and snails are common garden pests that can also target sundews. They feed on the leaves, leaving behind irregular holes and slime trails. These pests are active during nighttime and thrive in moist environments.

To protect your sundew from slugs and snails, create physical barriers such as copper tape or diatomaceous earth around the pot or garden bed. These materials create a barrier that slugs and snails find difficult to cross. Additionally, you can manually remove these pests by handpicking them off the plant during nighttime patrols. If the infestation persists, consider using iron phosphate-based slug pellets which are safe for pets and wildlife.

5. Whiteflies

Whiteflies are small insects that resemble tiny moths with powdery white wings. They infest sundews by sucking sap from the leaves, leading to yellowing, wilting, and stunted growth. Whiteflies are often found on the undersides of leaves, and when disturbed, they fly up in a cloud of white.

To control whiteflies, start by gently shaking the affected leaves to dislodge the insects. Introduce natural predators like parasitic wasps or lacewings to help control the population. Sticky traps placed near the plant can also help catch adult whiteflies. If necessary, use insecticidal soap or neem oil spray to target the remaining pests. Repeat treatments may be required to eliminate all whiteflies.

Remember, prevention is key when it comes to pest control. Maintain proper cultural care for your sundews, including providing adequate sunlight, water, and humidity levels. Regularly inspect your plants for signs of pest infestations and take immediate action at the first sign of trouble. With a little vigilance and proper treatment, you can keep your sundews healthy and thriving for years to come.

In conclusion, sundews are unique and fascinating plants that require special care to thrive. By familiarizing yourself with the most common pests that can infest these carnivorous plants and knowing how to identify and treat them effectively, you can ensure the health and longevity of your sundew collection. Happy gardening!