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 5OC
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: 0845 602 2553

Technical Services Hotline: 0845 602 2553