Trichogramma wasps card hang on a leek plant to control leek moth

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Identification card icon Identification

Tricho-Gard® is a biological alternative to protect garden crops and gardens against butterflies and moth pests. Inside the card, there are trichogramma pupae in host eggs, a small moth egg parasite wasp of the species Trichogramma brassicae.

The adults Trichogramma wasps are tiny, measuring less than 1 mm. After mating, females actively seek lepidopteran eggs such as Leek moth (Acrolepiopsis assectella), Cabbage moth (Plutella xylostella), Cabbage looper (Trichoplusia ni) and Cabbage white (Artogeia rapae). She lays her eggs inside these. The wasp larvae develop and feed on the pest embryo. A new generation of trichogramma will emerge 2 weeks later.

Trichogramma brassicae has been selected specifically for field of Alliacea and Brassicaceae (cruciferous) family crops. For several years, its use has been an alternative to conventional insecticides and bio-insecticides like Bacillus thuringiensis (Bt) to garlic, leek and cruciferous growers.The card can also be used in combination with Bt products to enhance the protection of some more sensitive area.

The Use of Tricho-Gard® can be applied without pesticide equipment, at all hours of the day and in different environmental conditions (rain, wind, soggy soil, etc.).

  • Alliacea family : leek, garlic, onion, shallots, chives, etc.
  • Cruciferous vegetables : broccoli, cauliflower, cabbage, etc.
  • Ornamental plants
  • Greenhouses

  • Leek moth (Acrolepiopsis assectella)
  • Cabbage moth (Plutella xylostella)
  • Cabbage looper (Trichoplusia ni)
  • Cabbage white (Artogeia rapae)
  • Other species of lepidopteran (moth and butterfly) pests

  • Optimal conditions are a temperature between 18 and 30 ° C and a humidity relativede 50 and 80%.
  • A female lays 50 eggs over a period of several days.
  • Trichograms on maps emerge after 2-4 days depending on temperature.
  • The eggs parasitized by Trichogramma black after 4-6 days. New adults emerge 3-6 days depending on ambient temperature.


Tricho-Gard Card

Water-resistant paper card, which on the inside contains glued pupae of Trichogramma brassicae.

Application rate

Tricho-Gard (tiny wasps called trichogramma)
Crops Quantity Surface Frequency Duration
(garlic, leek, onion, etc.)
1 card of 4 000 pupae 100 m2 week 10 weeks
cruciferous crops
(broccoli, cauliflower, cabbage, etc.)
1 card of 8 000 pupae 200 m2 week 10 weeks

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  • Fiche signalitique

  1.   - Fighting Leek Moths in Garlic Crops Using Trichogramma (Anatis Bioprotection, 2017)
  2.   - Trichogramma pupae spraying and mechanical application of predatory mites (Anatis Bioprotection, 2017)
  3.   - Use of Trichogramma wasps in Germany (O. Zimmermann, 2004)

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Biological control products and beneficial insects for farmers and greenhouse growers