Beneficial Nematodes - Biological Pest Control

Beneficial nematodes, or parasitic and predatory nematode worms, are environmentally friendly natural parasites of insects pests but do not harm plants or other animals. They are an effective, non-chemical control method of many soil-dwelling insect pests. Introducing nematodes into your garden controls pests without the use of pesticides for natural pest control in the garden. 

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4.5 out of 5 stars (32)
$48.62
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Milky Spore Powder - OMRI certified organic Japanese beetle grub control.
2 out of 5 stars (6)
$18.07
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Lawn & Garden Dispenser - use to apply Milky Spore powder, Insect Dust Diatomaceous Earth, and any other garden powder or dust.
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$397.45
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A professional and highly selective, biological larvicide that is OMRI Listed for use in greenhouses to control fungus gnat larvae.
$45.44
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Control of plant parasitic nematodes and fungi for home orchards, vineyards, vegetable gardens, lawns and ornamentals.
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$18.73
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Attracts beneficial honey bees to the garden for improved pollination.
$157.80
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A great and natural way of eliminating thrips and whiteflies from salad and ornamental crops.
4 out of 5 stars (1)
$186.60
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Effectively kills a variety of spider mites that can permanently damage crops and plants.
$85.50
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Steinernema feltiae are entomopathogenic, or insecticidal, nematodes that are effective against larvae of various immature (larvae) dipterous insects such as Sciarid flies, fungus gnats, tipulids, and mushroom flies.
$339.00
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The box contains 500,000 predatory mites that effectively eliminates and stops the spread of spider mites, various types of thrips and several other mites.
$230.00
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A professional granular nematicide for healthier and greener cool & warm-season turf-grasses on golf courses, sports fields and sod farms.
$112.60
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Contains predatory spider mites that effectively kills unwanted spider mites on crops and leaves.
$20.84
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Attracts both lady bugs and lacewings that feed on aphids, whiteflies, mite an other garden pests.
$169.25
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Contains predatory mites that effectively kills unwanted spider mites on crops and leaves.
$92.90
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The bottle contains 50,000 predatory mites that will effectively control various thrips and spider mite species.
$205.80
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This contains 1,000 predator bugs that provides complete elimination of damaging thrips species along with aphids, spider mites and butterfly eggs from crops.
$109.80
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Contains active entomopathogenic nematodes (thread worms) that combat larvae of various beetle species.
$149.40
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This bottle contains Neoseiulus californicus (formerly known as Amblyseius californicus). These predatory mites effectively controls two spotted spider mite, fruit spider mite, citrus red mite, begonia mite, and broad mite.
$90.55
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Contains predatory mites that effectively eliminates and stops the spread of spider mites, various types of thrips and several other mites.
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$88.20
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This cylinder contains Stratiolaelaps scimitus (formerly known as Hypoaspis miles). These predatory mites effectively controls Sciarid flies.
$129.30
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This bottle contains Aphidius colemani pupae (Parasitic Wasps). These live organisms effectively controls cotton aphid, tobacco aphid, and peach potato aphid.
$561.00
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Long duration active predatory mites that can last for over 4 to 6 weeks to eliminate thrips and whiteflies on specific crops.
$94.20
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Combats caterpillars and larvae of a variety of moths and beetles.
$92.10
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Contains predatory spider mites that effectively kills unwanted spider pests on crops and leaves.
$153.30
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Targets aphids and many other pest insects, like whiteflies, thrips and moth eggs.

How Nematodes Work

Nematodes are part of the roundworm family, and are very commonly found in moist soils. You may already have this type of nematode living in your garden, but in lower levels than a nematode treatment would contain. These nematodes are called “beneficial” or entomopathogenic and are completely harmless to humans, animals, and non-target pests. They live in the soil, and have a complicated life cycle. The “dauer” third larval stage is the infective stage, and the nematodes will enter their host through any body opening they can find or even through the insects exoskeleton. The nematodes release bacteria that kill the insect in a few days. The nematodes actually eat the bacteria, and the bacteria are attacking the host; the bacteria are the primary agents responsible for killing the insect host. 
 

When you apply nematodes to your yard or garden, you will introduce a very high number of these nematodes to the system. Eventually, if the treatment works successfully, all or almost all of the target insects will die, eliminating the hosts for the nematodes and the high populations of nematodes will also be diminished.

Nematode Pest Control

Beneficial nematodes are used for many soil dwelling pests, including white grubs (from Japanese beetle, oriental beetle, chafer beetle, and June beetle larvae), cutworms, sod webworms, pillbugs, many borers, and some caterpillars. Doing research on the pest you want to get rid of will help you to determine if you can use nematodes in your pest control regimen. 

How to Use Beneficial Nematodes

Since nematodes are living organisms, transporting and storing them can be difficult and delicate. There are several things you need to know when using this type of pest control. As with any do-it-yourself pest control project, always read the label for instructions, warnings, and safety precautions.

  • You can buy beneficial nematodes from garden centers and online distributors. They have a very short shelf lives.
  • Use nematodes very soon after you get them. They need to be kept cool and in a dark place, like a refrigerator, to keep them dormant. 
  • Often, nematodes will come in a foam block or clay pellets. Dissolve in barely warm water (right above room temperature). These animals can be spread in a watering can or with a sprayer with a large enough nozzle. 
  • Heat and sun (UV light) causes these creatures to quickly deteriorate and die. Don’t apply nematodes during times of direct sun.
  • Soil temperature should not be too cool; for the type of nematode we sell (S. Feltiae) 58 degrees to 68 degrees will create a good soil environment.
  • Soil needs to be moist. Water before and after application, and for several days afterwards to ensure the environment is right for the nematodes to do their work. 
  • Clean up debris before applying; excess weeds, rocks, and leaves can make it difficult for nematodes to get to the soil.
  • You will probably not physically see insects dying, but do not think your control measure isn’t working. If the damage from the pest insects continues to get worse over a week or two, you might have to reapply nematodes.
  • Nematodes are sometimes advertised to work for fleas. The type of nematode you purchase will determine the flea control you will experience. The type S. carpocapsae has been studied and found to be effective against fleas.

See all of our natural & organic pest products for additional options.

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We sell professional do it yourself pest control (diy), exterminator and extermination insecticide, pesticide, chemical and bug killer treatment products to spray, eliminate and exterminate pests.

Many of our products are not available in stores such as Home Depot, Walmart or Lowes.