Agricultural Solutions UK





Nemasys® has activity on sciarids/fungus gnats (Bradysia spp.), western flower thrips (Frankliniella occidentalis), leafminer and Tuta absoluta in greenhouse horticulture production.


Advantages of using Nemasys®:

  • Microscopic organisms occurring naturally in the soil
  • Nematodes attack insect pests by entering natural body openings
  • Reproduces inside the dead pest
  • Safe to crops, users and the environment
  • Nematodes can survive up to 6 weeks in the soil

Why Nemasys®?

Nemasys® is a biological insecticide containing nematodes of the species Steinernema feltiae. This product acts in a natural way, so is compatible with organic farming. Therefore, Nemasys® can be used in organic systems or as part of your IPM programme to reduce residues. Nemasys® is a safe and effective way to deal with various insect pests. Nematodes attack the insect by entering natural body openings, releasing a bacteria which quickly and safely kills it. The nematodes then reproduce inside the dead pest and release a new generation of hungry nematodes, which disperse and search for further prey. Insect pests stop feeding and die as the nematodes spread throughout their body.

Product Profile

Active ingredient(s)Nematodes: species Steinernema feltiae
Pack size50 million or 250 million
CropsGreenhouse horticulture including edible crops
Pest activitySciarids/fungus gnats (Bradysia spp.), western flower thrips (Frankliniella occidentalis), leafminer and Tuta absoluta
Rate of application250,000 – 1,000,000 per m2 or 1,000,000 per litre depending on target pest (see label)
Application area treatedUp to 200 m2 (50 million pack size) or up to 1,000 m2 (250 million pack size), depending on target pest
VolumeUp to 1 L/m2 depending on pest
Soil temperatureBetween 10OC and 30OC
Application methodSoil drench or high volume foliar spray (via boom sprayer, knapsack, lance, sprinklers or drip irrigation)
Application adviceAvoid 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 medium or courser spray at the intended application pressure
Stir the contents of the pack thoroughly making sure the entire product is mixed
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® is applied to the foliage or to the soil.
  • After application our specially selected nematodes attack the insect pest by entering natural body openings or by penetrating the pest cuticle directly.
  • Once inside, they release bacteria that stops the pest 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.

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