Nematodes Fungus gnats

Nematodes parasites for many insect pests

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Identification card icon Identification

Entomopathogenic nematodes of the species Steinernema feltia are a biological control agents used to control fungus gnats,shoreflies and thrips.This agent is ideal to quickly controlling moderate pest infestations.

Entomopathogenic nematodes are distributed in the juvenile stage (infectious larvae). There are 0,4 to 1,5 mm long and can be observed with a 20 X magnifying glass. Once in the soil, they penetrate in the insect pest by its natural openings (mouth, respiratory orifices and anus). The Nematodes feed on the tissues and release symbiotic bacteria that are present in their intestines. These bacteria kill the host after 24 to 48 hours.

The majority of fungus gnat species feed on decomposing algae and on organic matter. On the other hand, some species of the Bradysia genus prefer to feed on living plant tissues or mushroom tissues. They cause significant growth problems and promote the spread of fungal diseases such as Pythium, Fusarium and Rhizoctonia.

  • Market garden crops (cucumbers, tomatoes, peppers, lettuce, etc.)
  • Ornamental crops
  • Mushrooms
  • Potted plants
  • Tree Nursery
  • Cannabis

  • Fungus gnats (soil application)
  • Shore flies (soil application)
  • Thrips (leaf application)
  • Leafminer (leaf application)

  • Optimum conditions are a temperature between 15 to 20°C and moist soil.
  • Become inactive below 15°C and above 30°C.
  • The ideal pH is between 4 to 8.
  • After their application, juvenile nematodes look for hosts to infect.
  • They enter the target insects through their natural orifices (mouth, anus and spiracles).
  • They then release a bacterium that kills the host within a few days.
  • Nematodes cause host death within days.


Sponge with nematodes

A synthetic sponge containing entomopathogenic nematodes. Just squeeze the sponge into the water to make the nematode solution.

Before starting

  • Always check the viability of your beneficial nematodes.
  • To do this, place a small amount of your nematode mixture in a transparent plastic bag (eg: ziploc bag) and observe the nematodes using a 20 X magnifying glass.
  • Live nematodes (0.4 to 1, 5 mm) squirm or are shaped like an “S”.
  • Dead nematodes are immobile and straight.

Application rate

Treatment Quantity Surface Frequency Duration
Light curatif 250 000 to 500 000 m2 as needed 1 to 2 introduction
Strong curatif 250 000 to 500 000 m2 every 7 days 2 to 3 introductions

Coming content

  • Upon receipt of product, remove from shipping packaging and use immediately or store in a refrigerated area 5 °C (40 °F) Do not freeze.
  • Do not freeze.
  • Do not use if incorrectly stored.
  • Store for a maximum of 6 weeks.
  • Always check viability before making the root application (see section Before starting)

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Biological control products and beneficial insects for farmers and greenhouse growers