Updated: June 28, 2023

Nematodes are microscopic roundworms that can cause damage to plants, including the popular Tornado Plant (Tradescantia zebrina). These pests can infest the roots of the plant, causing stunted growth, yellowing leaves, and even death if left untreated. Fortunately, there are several effective methods to get rid of nematodes and restore the health of your Tornado Plant. In this article, we will explore these methods and provide step-by-step instructions on how to implement them.

1. Identify the Problem

Before proceeding with any treatment, it is crucial to confirm that your Tornado Plant is indeed infested with nematodes. Look for signs such as wilting or yellowing leaves, stunted growth, and root damage. Carefully inspect the roots for small, white worms or galls (swollen areas) which indicate nematode presence.

2. Quarantine the Infected Plant

To prevent the spread of nematodes to other plants, it is important to isolate the infected Tornado Plant. Remove it from its current location and place it in a separate area away from other plants until the infestation is under control.

3. Sterilize Tools and Containers

Nematodes can easily spread through contaminated tools and containers. Before working with your Tornado Plant, make sure to sterilize all gardening tools and containers using a solution of one part bleach to nine parts water. This will help minimize the risk of spreading nematodes to healthy plants.

4. Apply Beneficial Nematodes

One effective method of controlling harmful nematodes is by introducing beneficial nematodes into the soil. These microscopic organisms are natural predators of plant-parasitic nematodes and can help reduce their population.

To apply beneficial nematodes, follow these steps:

  • Purchase a commercial product containing beneficial nematodes suitable for controlling plant-parasitic nematodes.
  • Mix the nematodes with water according to the instructions provided by the manufacturer.
  • Water the soil around the Tornado Plant with the nematode solution, ensuring that the roots are well covered.
  • Repeat this process as recommended by the manufacturer, usually every 2-4 weeks, until the nematode population is under control.

5. Solarize the Soil

Solarization is a method that utilizes solar heat to kill nematodes and other soil-borne pests. This technique involves covering the soil around the Tornado Plant with clear plastic to trap sunlight and raise temperatures to lethal levels for nematodes.

To solarize the soil, follow these steps:

  • Choose a sunny period, preferably during summer when temperatures are high and consistent.
  • Clear any debris or weeds from the area around the Tornado Plant.
  • Water the soil thoroughly to ensure it is moist before covering.
  • Cover the moist soil with clear plastic, securing the edges with rocks or soil to seal it tightly.
  • Leave the plastic in place for 4-6 weeks, allowing the heat to penetrate and kill nematodes.
  • After solarization, remove the plastic and allow the soil to cool before replanting.

6. Use Organic Soil Amendments

Certain organic amendments can help suppress nematode populations and improve the overall health of your Tornado Plant. Incorporate these amendments into the soil before planting or as a top dressing:

  • Marigold: Planting marigolds around your Tornado Plant can help repel and reduce nematodes. The roots of marigolds release compounds that are toxic to nematodes.
  • Neem Oil: Applying neem oil to the foliage and soil can provide control against nematodes. Dilute neem oil according to the instructions on the product label and spray it on the affected plant parts.
  • Compost: Adding compost to the soil can improve its structure and fertility, creating a healthier environment for your Tornado Plant. Healthy plants are better able to resist nematode attacks.

7. Practice Crop Rotation

Crop rotation is an effective preventive measure against nematodes. Avoid planting Tornado Plants or other susceptible species in the same location every year. Instead, rotate your crops, planting nematode-resistant plants or those that are not hosts to the particular nematode species that infested your Tornado Plant.

By following these steps and being proactive in managing nematode infestations, you can successfully eliminate these pests from your Tornado Plant and ensure its continued growth and vitality. Remember to regularly inspect your plants and take appropriate measures to prevent future infestations.