BASF Agricultural Solutions UK

Nemasys J


Nemasys® J contains the nematode Steinernema feltiae and effectively targets leatherjackets (Tipula spp.) in turf.


Advantages of using Nemasys® J:

  • Nemasys® J can be used in organic systems or as part of an IPM programme
  • Safe to users and the environment
  • Nematodes survive up to approximately 4 weeks in the soil

Why Nemasys® J?

Nemasys® J is a biological insecticide containing nematodes of the species Steinernema feltiae, which occur naturally in the soil and when applied at the appropriate rate in Nemasys® J will effectively target and kill leatherjackets in turfgrass.

The nematodes attack the leatherjacket by entering natural body openings, releasing a bacteria which quickly and safely kills it. The nematodes then reproduce inside the dead grub and release a new generation of hungry nematodes, which disperse and search for further prey. Leatherjackets stop feeding and die as the nematodes spread throughout their body.

Product Profile

Active ingredient(s)Nematodes: species Steinernema feltiae
Pack size250 million
Pest activityLeatherjackets (Tipula spp.)
Rate of application500,000 per m2
Application area treated500 m2
Volume0.1 L/m2 depending on pest
Soil temperatureBetween 10°C and 30°C
Application methodSoil drench (via boom sprayer, knapsack, lance or sprinklers)
Application adviceApply when leatherjackets are small and close to the soil surface, usually mid-late August to October
Ensure soil under the turf is moist (or irrigate turf thoroughly before application) and irrigate after application; application during rain is ideal
Avoid applications in direct sunlight, evening applications are best
Do not exceed 300 psi/20 bar/2000 kPa pump pressure
Nozzle aperture should be greater than 0.5 mm
Suitable nozzles should produce a course spray at the intended application pressure
Make up the stock solution and mix thoroughly to ensure that the nematodes are well dispersed.
PrecautionsUpon receipt, use immediately or store in a refrigerator at 5°C
Do not use product if past expiry date or incorrectly stored (do not freeze)
Use entire packet at one time, do not store diluted product

How do Nematodes work?

• Nemasys® J should be applied to the turfgrass at high volume when the leatherjackets are small and close to the suface.

• After application the nematodes attack the leatherjackets by entering natural body openings or by penetrating the pest cuticle directly.

• Once inside, they release bacteria that stop the leatherjacket from feeding, quickly killing the pest.

• They do not stop there. The nematodes reproduce inside the dead pest.

• They release a new generation of hungry nematodes, which disperse to hunt down further pests.

• When nematodes can no longer find a host pest, they will die back to their original numbers. The more pests there are, the better nematodes perform.

 Technical Services Hotline +44 845 602 2553

Technical Services Hotline +44 845 602 2553

Technical Services Hotline

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