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Inside Sleeve

Nemasys Biological leatherjacket killer

  • Fast and effective control
  • Compatible with organic gardening
  • Easy to use, just add water

Nemasys Biological leatherjacket killer controls newly hatched larvae that attack grass roots resulting in slow growth and yellow patches on lawns.

For best results:

  • Always use in accordance with instructions.
  • Upon receipt, use immediately or store in a refrigerator (do not freeze).
  • Do not use product beyond Use By Date.
  • Use the entire packet at one time, do not store stock solution.
  • Apply late August to October (when soil temperature is above 10 °C) or 2 weeks after you see crane flies (daddy longlegs).
  • Cut grass prior to application.
  • Avoid applications in bright sunlight.
  • Apply in the evening or in dull conditions.
  • Ideally apply during rainfall.
  • It is important to water treated areas thoroughly and immediately after application to ensure the nematodes reach the soil.
  • Soil must be moist before and for at least 2 weeks after application.
  • Infected leatherjackets stop feeding and die within 2 – 4 weeks.
  • See inside sleeve for further information.

How to use:

  1. Dissolve the entire contents of the pack in a bucket containing 5 litres of water to create a stock solution.
  2. Stir vigorously and immediately take 0.5 litre of the stock solution, add to a 5 litre watering can fitted with a very coarse rose and fill with water.
  3. Apply the solution to a tenth of the soil area to be treated.
  4. Repeat steps 2 and 3 until the whole area is treated.
  5. Water the treated area thoroughly after application.

This pack fills 10 watering cans of 5 litres and treats up to 100m2 (120sq yds). Also easily applied with a recommended garden hose applicator – see inner sleeve or visit


Correct as of May 2016 - For reference only, please always use the instructions supplied with your pack.