Designed to target pests that spend part of their lifecycle in the soil, the Double Death Mix tackles a wide range of invaders—more than 250 identified insects—including fleas, ticks, thrips, fungus gnats, and cutworms. By pairing two nematode genera, it provides deeper and shallower soil reach, maximizing contact with pests from the surface down to several inches below.

• Two-depth coverage: Steinernema genus active in the upper 3 inches of soil; Heterorhabditis genus active from about 3 to 6 inches—extending protection where many soil-dwelling pests hide.
• Natural, targeted action: Predatory nematodes are microscopic athletes of the soil. They locate pests, release beneficial bacteria inside the host, kill the pest, and then feed on the remains—without leaving harmful residues.
• Broad pest range: Effective against a multitude of soil-associated pests, including those that are hard to reach with conventional treatments, helping protect roots and seedlings across containers, raised beds, and garden plots.
• Easy, residue-free application: Applied as a liquid solution mixed with water, then distributed to the root zone where pests reside. Maintain soil moisture to support nematode activity after application.
• Ideal for home gardeners and small-scale growers: A practical, natural alternative for containers, raised beds, and greenhouse settings where soil pests commonly thrive.
• Trusted brand and real-world feedback: The Soil Makers deliver science-based, natural pest control with customer validation—1 reported review at 5.0/5.

Why this blend stands out: by combining Steinernema and Heterorhabditis, Double Death Mix creates a broader, depth-spanning line of defense that improves pest contact in varied soils and moisture conditions. It’s a practical, environmentally friendly option for keeping crops and ornamentals healthy without chemical pesticides.

From The Soil Makers, a name you can rely on for thoughtful, effective soil-pest solutions that fit into regenerative gardening practices. If soil-dwelling pests are limiting your outdoor or indoor plant success, Double Death Mix is designed to help you protect roots, stems, and young plants with natural, targeted predation.

 Predatory Nematodes - Double Death Mix from The Soil Makers is a natural, soil-dwelling pest control that combines two predator nematode genera to guard roots across multiple soil depths. This liquid-applied blend delivers broad, pesticide-free pest suppression for soils indoors and out, aligning with sustainable gardening practices.

Predatory Nematodes are an effective control for literally hundreds of pest insects that have a life stage in the soil. This is a partial list of the more common species "Double-Death" Predator Nematodes are known to control:

Banded Cucumber Beetle, Bark Beetle, Click Beetle, Colorado Potato Beetle, Checkered Beetle, Flea Beetle, Japanese Beetle, June Beetle, Leaf Beetle, Mexican Bean Beetle, Pine Beetle, Powder Post Beetle, Scarab Beetle, Southern Pine Beetle, White Fringed Beetle

European Corn Borer, Onion Borer, Round Headed Borer, Wood Borer

Field Cricket, Morman Cricket

Black Fly, Crane Fly, Fruit Fly, Saw Fly

Carpenter Moth, Codling Moth, Gypsy Moth, Meal Moth, Oriental Fruit Moth, Pine Tip Moth, Winter Moth

Banana Root Weevil, Boll Weevil, Cane Weevil, Corn Root Weevil, Pecan Weevil, Pine Weevil, Rice Weevil, Strawberry Root Weevil

Army Worms, Cabbage Worm, Corn Earworms, Cutworms, Fall Army Worm, Hornworm, Meal Worm, Measuring Worm (Loopers), Melon Worm, Pink Bollworm, Potato Tubeworm, Sod Webworm, Southern Rootworm, Spruce Budworm, Tobacco Budworm, Tobacco Hornworm, Webworms, Wireworms

Algae Gnats, Apple Leaf Roller, Assassin Bugs, Bean Leaf Roller, Billbugs, Cabbage Aphid, Cabbage Looper, Chinch Bugs, Cotton Stainer, Fungus Gnats, Gall Midges, Gall Gnats, German Cockroaches, Grasshoppers, Imported Fire Ants, Lacewings, Leaf Skeletonizer, Leather Jackets, Pear Aphids, Red Bugs, Seed Corn Maggot, Squash Bugs, Sting Bugs, Termite, Thrips, White Grubs, Yellow Fever Mosquito, Ants, Poultry Mites, Ticks

As you can see, this is quite a list! This is only the insects known to have been controlled by "Double-Death" Predatory Nematodes, and many more probably are controlled by predator nematodes, if they have a life stage in the soil.

"Double-Death" Predatory Nematodes can survive over a wide temperature range (32 - 90 F.), but are most effective as an insect control at soil temperatures of 50 -85 F. Apply "Double-Death" Predatory Nematodes every 4-6 weeks throughout the season when soil temperatures are in this range. For insects that emerge in Spring and return in the Fall, Springtime and Fall applications are most effective, timed for when the soil temperature is about 50 - 55 F. both times.

One Million Treats up to 3,000 sq. feet of surface area; six million treats to 18,000'; they'll store in refrigerator up to two months.