NemAttack™ Beneficial Nematodes, Sf

Steinernema feltiae

Best suited for mobile pests that include fungus gnats, ticks, thrips, leafminers, caterpillars, cutworms, sod webworms, onion maggots, subterranean termites and more. Best Choice for Foliar and Greenhouse Applications. Safe for use in gardens.
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  • NemAttack, Sf - 1/2 Garden Size
    SKU: 1220309
  • $25.00
  • NemAttack, Sf - Garden Size
    SKU: 1220310
  • $40.50
  • NemAttack, Sf - Farm Size
    SKU: 1220311
  • $72.00
  • NemAttack, Sf - Small Ranch Size
    SKU: 1221701
  • $198.00
  • NemAttack, Sf - Large Ranch Size
    SKU: 1221704
  • $270.00
  • Description
  • Instructions
  • Shipping Info
  • Technical
  • MSDS
  • Video

Best Choice for Foliar and Greenhouse Applications.

Our Beneficial Nematodes arrive ready-to-use. Just add to water and apply to the soil or growing media with virtually any watering device!

NemAttack Sf (Steinernema feltiae) Beneficial Nematodes are recommended to control and prevent the following insects:

using a watering can to apply nematodesAttacks Mobile Pests such as: Fungus gnats, ticks, thrips, leafminers, caterpillars, cutworms, sod webworms, onion maggots, subterranean termites. American cockroach, armyworm, artichoke plume moth, Asian cockroach, beet armyworm, cabbage maggots, black cutworm, bluegrass weevil, codling moth, corn earworm, cotton bollworm, cucumber beetle, fall armyworm, fly larvae, fruit fly, German cockroach, mole crickets, tobacco budworm, wireworm and more.


Remove nematode package from insulated shipping container or packaging and place in refrigerator until ready to use.

Beneficial Nematodes are live microscopic organisms (non-segmented round worms) that occur naturally in soil throughout the world. They are parasitic to insect pests that typically have a developing (larval or pupal) stage of life in the soil; however, they have been known to also parasitize above ground stages of adults, nymphs and larvae.   They are completely safe to use and will not affect mammals, aquatic life, birds, reptiles or amphibians.After application, the nematodes immediately get to work. Upon finding a pest, they enter it through various body openings or directly through the body wall. Once inside, it is not the nematode that actually kills the pest, but the toxic bacteria inside the nematode's gut that is the real weapon – symbiotic bacteria, that when released inside and insect, kill it within 24 - 48 hours by causing blood poisoning.

Beneficial Nematodes release the bacteria in order to create food and a hospitable environment for their own reproduction. As the food resources within the dead pest become scarce, the nematodes exit and immediately begin searching for a new host. As long as there is a suitable host, they will continue to survive and parasitize.

How Much Do I Need? Order enough to treat your infested area at least two times. Quantities and treatment areas are approximate.

Package Size Quantity Treatment Area Shipping Method
1/2 Garden Size 5 million 1,600 sq. ft. USPS Priority
Garden Size 10 million 3,200 sq. ft. USPS Priority
Farm Size 50 million 1 Acre 2nd Day
Small Ranch Size 250 million 5 Acres Next Day
Large Ranch Size 500 million 10 Acres Next Day

Important Shipping Note:
  • ½ Garden and Garden Sizes ship via USPS Priority.
  • Farm Size packages ship via 2nd Day.
  • Small and Large Size Ranch packages ship Overnight.
  • When will my order ship?
    Orders ship Monday – Wednesday and may take 2 days to process.
    Orders placed Tuesday evening or later will ship the following Monday.
    Nematodes cannot be shipped to Hawaii, Guam, Puerto Rico, US VI.

This Product Controls These Pests or Diseases:
This product works as a beneficial insect for control of the following: Fleas, Flies (mult), Fruit Flys (Drasophylla), Fungus Gnats (Bradysia impatiens), Gnats, Thrips (Franklinothrips sp)


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