Nemasys Chafer Killer 500 sqm

(2 customer reviews)


Quantity Price
1 £99.99
2+ £89.99

Chafer grubs are the larvae of chafer beetles and they can quickly devastate a lawn. Control chafer grubs naturally by treating with Nemasys® Chafer Grub Killer containing millions of natural nematodes. It is best to treat in the Autumn (Sept/Oct) when the chafer grubs are newly hatched as they are the most susceptible to the nematodes PLUS the soil is warm (the treatment needs a soil temp of 12c) and the grubs are close to the surface, HOWEVER you can treat at any other times of the year i.e. in the spring/summer, but the mature chafer grubs are much harder to kill, so you must treat in September as well. This pack of Nemasys® Chafer Grub Killer treats 500 sqm. 

N.B. We also have a Chafer Trap available to target the adult beetles as they emerge.

Special Offer – Help your lawn recover from a Chafer attack

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Full Description

Chafer GrubsChafer Grubs – Chafer Grubs are creamy coloured, approx 1.5 cm in length, have distinctive legs and will be found in the grass roots. Chafer grubs attack the grass roots causing the grass to yellow. Sampling your lawn to identify the pest – inspect discoloured areas of lawn by cutting a 6″ X 6″ section of turf on three sides and peeling back the sod. Examine the upper 2 inches of roots for white grubs. Shake the sample or probe through the soil with knife or screwdriver to dislodge the grubs. As the grubs will not be distributed evenly, examine other parts of the lawn to find out the extent of the infection. Spotting the adult chafer beetles will help you to identify the pest responsible for the damage, BUT always inspect the lawn for the grubs to be sure. Birds (magpies and crows), foxes &/or badgers attacking the grass in an attempt to eat the grubs will cause even more damage and is often the 1st indicator of a chafer grub infestation.

Adult Chafer BeetlesAdult Beetles – The Garden Chafer Beetle emerges in May/June from the lawn to mate before laying eggs in the lawn from where it has just emerged. These eggs hatch to produced chafer grubs. The eggs are often laid in the same place each year so the problem gets progressively worse. The Chafer Grubs feed on grass roots from July until late Autumn before burrowing deep into the ground to pupate. They are a source of food for large birds-crows and woodpeckers as well as foxes and badgers. These may do more harm to your lawn by ripping it up to get at the grubs. The Chafer Grubs then lay dormant during the winter deep in the ground before moving to the surface the following spring to emerge as beetles in May / June and starting the process again.

Control chafer grubs naturally by applying Nemasys® Chafer Grub Killer containing millions of nematodes (Heterorhabditis bacteriophora) to the infected lawn as soon as the chafer grubs are discovered and the soil temp must be 12°C or apply in the autumn (Sept / Oct) as this is when the chafer grubs are the most susceptible to the nematodes. Nemasys® Chafer Grub Killer is effective at killing leatherjackets, but is harmless to children, wildlife and pets and the lawn may be used immediately after application. Apply as follows :-

  • Apply Nemasys® Chafer Grub Killer in September/OctoberThis is the ideal time to treat as the soil is warm PLUS the chafer grubs are newly hatched and are the most susceptible to the nematodes, so if you have had chafer grubs in the past or have discovered a infestation or your neighbours are infested and you want to keep them at bay, treat in September/October. Pre-order for delivery in September.
  • Apply Nemasys® Chafer Grub Killer when chafer grubs are discovered – Nemasys® Chafer Grub Killer is normally applied in September as this is when the chafer grubs are newly hatched and most susceptible to the nematodes, but if you have discover chafer grubs at any other time of year i.e. in the spring/summer then you can treat during the year (and the soil temp is 12°C), but you must treat in September as well. Available NOW.

How to apply? – Nemasys® Chafer Grub Killer is easy to use. Simply mix the harmless powder with water & apply to the lawn using a watering can fitted with a rose (we recommend the Haws Rose no.14) or use a EasyNem Applicator / Hose-end Feeder / Nematode Applicator for larger areas. Nemasys® Chafer Grub Killer should be applied to a moist lawn (we recommend pre – watering) on a dull day or in the evening. After application you MUST wash the nematodes into the lawn by watering heavily with a hose or a sprinkler. Once applied the nematodes will seek out the chafer grubs and on contact they enter the larvae and destroy it. Having destroyed the grubs, the nematodes multiply and are released back into the soil to hunt down more chafer grubs.

How is it sent? – Nemasys® Chafer Grub Killer is a perishable, living product, so it is sent out fresh by Royal Mail 1st class post. Being a perishable, living product, it must be used before the expiry date (which is marked on the inside of the pack and will be at least 2 weeks) and it must be stored in the fridge until it is needed. Once opened, the contents do not keep, so it must be used in one day – do NOT store the made up solution or powder. 1 pack will go through your letterbox and should be popped in the fridge as soon as possible – they are fine on the doormat while you are at work.

N.B. Need a Coarse Rose, EasyNem Applicator, Hose-end Feeder or Nematode Applicator – Add one to your basket and save £1.00 off a Coarse Rose, save £2.00 off a EasyNem Applicator or a Hose-end Feeder or save £3.50 off a Nematode Applicator when bought with your nematodes (savings applied at the checkout).


  1. Anonymous (verified owner)

    Easy access on line. Good coverage of products available. Reasonable price, with good delivery service to your door. My lawn was infested with chafer grubs and a complete mess of brown and dead/dying patches. Now in mid-October and a proud owner of a full green lawn. May I also recommend Nemasys Biological vine weevil killer. Marvellous. Follow all the instructions for both products and you will not be disappointed.

  2. Brian (verified owner)

    I asked for advise regarding getting rid of chafer grubs. I got all the information about using nematodes and the equipment needed. I purchased what they suggested, this arrived the next day. Easy to use website, and very helpful staff. Will definitely use again.

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