How to Control Root-knot Nematodes on Houseplants: Root-knot Nematodes Treatment

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Root-knot Nematodes Identification

Root-knot Nematodes (Meloidogyne spp) also called eelworms are microscopic soil-living worms which interfere with the plants' ability to absorb water, resulting in wilting, drooping, yellowing and eventual plant collapse for no apparent reason.

Root-knot Nematodes invade the plant roots from where they reproduce rapidly. A single female can produce up to 1000 eggs. The life cycle can be completed in as little as 21 to 28 days during warm conditions, allowing populations to build up very fast.

The Root-knot Nematodes release chemicals that cause root cells to grow and form galls (swellings), which cannot be easily rubbed off, differentiating them from the beneficial nitrogen-fixing nodules on legumes roots.

When you remove the plant from its pot and inspect the roots, you will find large, corky swellings on the roots. Since they live inside the roots and the soil, Root-knot Nematodes infestation is difficult to control once established.

How to Treat Root-knot Nematodes on Indoor Plants

1. There is no chemical control for Root-knot Nematodes. The only solution is to destroy the infested plant immediately by burning it.


2. Do not dispose the affected plant in the compost heap to prevent future infestation should you use the compost.


3. Discard the contaminated soil and thoroughly sterilize the pot with a 10% bleach solution.

How to Prevent Root-knot Nematodes on Houseplants

1. Obtain your plants from a reputable supplier only, to avoid getting plants that may be infested by Root-knot Nematodes.


2. Use only sterilized soil for your plants; Root-knot Nematodes can last in contaminated soil for a long time.


3. Always sterilize tools like pruning shears, knives, scissors and others to prevent cross-contamination.


4. During repotting, inspect the plant roots for these root-knot nematodes and take immediate corrective measures.

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