NemaFence® Phasma

Defence against slugs and snails

What is NemaFence® Phasma?

  • Microscopically small worms (nematodes) of the species Phasmarhabditis californica
  • Rapid slug control when used curatively in moist soil
  • Effective in a soil temperature range between 5°C and 30°C

Which pests does NemaFence® Phasma control?

  • Arion spp.
  • Grey field slug (Deroceras reticulatum)
  • Brown field slug (Deroceras panormitanum)
  • Greenhouse slug (Lehmannia valentiana)
  • Small snails (living in the substrate)

What are the benefits of NemaFence® Phasma?

  • Efficient and entirely biological way to control soil-dwelling slugs
  • Safe for humans, animals, and the environment
  • Easy to use
  • No pest resistance problems  

How does it control pests?

  • Infective juveniles actively search the soil for slugs
  • They penetrate their prey through the respiratory opening under the mantle
  • Once inside, they release symbiotic bacteria
  • Infected slugs stop feeding within 3 to 5 days
  • The nematodes multiply inside the slug      
  • Eventually the slug dies due to toxic compounds produced by the symbiotic bacteria.
  • When it starts to decompose, a new generation of nematodes disperses in search of their next prey

In which crops is NemaFence® Phasma effective?

  • Soft fruit crops
  • Public green

Want to know more? Contact your Biobest advisor for tailored advice. 


NemaFence® Phasma is delivered as a gel formulation in units of:

  • 12 million      
  • 30 million      
  • 250 million

Local regulations may impose restrictions on the use of this product. Contact your authorities or contact your Biobest consultant.
We produce our products and solutions for professional growers in horticulture.

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