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Beneficial Nematodes

Nematodes are naturally occurring microscopic worms, already present in our soil. Beneficial nematodes attack and kill targeted garden pests. They are environmentally friendly, do not cause harm to children, pets and wildlife, and can even be kept in your fridge!

These worm-like micro-organisms are typically less than 2mm in length, and occur naturally in soil where they hunt down and attack pests. Each nematode species has its own specific prey, meaning that they will harm their prey, and only their prey.

Research scientists have isolated the nematodes that kill specific garden pests including:

  • Slugs
  • Vine weevils
  • Chafer grubs
  • Leatherjackets
  • Caterpillars
  • Codling moth
  • Various others

BASF’s state of the art production facility in the UK produces billions of nematodes in a form that is easily applied by gardeners. Over 20,000 different species of nematodes have been classified, although some estimates put the total figure closer to one million! BASF has the largest specialist nematode production facility in the EU, growing trillions of beneficial nematodes for use in their Nemasys range of pest controls.

Why use nematodes?

The nematodes in Nemaslug and the Nemasys Range are naturally occurring microscopic worms, already present in our soil. Beneficial nematodes attack and kill targeted garden pests without the restrictions associated with chemical controls. Once treated, fruit and vegetable produce can be consumed in the normal way once washed.

Why choose Nemasys and Nemaslug

How long do nematodes keep before use?

When kept refrigerated, the pack will keep up to the expiry date printed on the inner sleeve. This varies with the product so check with your supplier if necessary. Once the contents have been exposed to the air it is important to use all the pack. Storing the solution mixed with water is not possible. Always apply the mixed solution as soon as possible.

How to use nematodes?

  • Mix the nematodes with water in the appropriate equipment (e.g. watering can, sprayer etc.) according to the label instructions.
  • Always apply the mixed solution as soon as possible.
  • The amount of water stated has been determined by research in different situations. This amount is the optimum required to ensure that the nematodes are applied at the correct rate and washed through the soil to the pest, or to reach where the pest is found. 
  • It is recommended that these volumes are not altered significantly, however, a slightly different sized watering can, for instance, will not prevent the nematodes from working.
  • The watering can will need to have a rose with large holes so that the Nematodes can pass through. This is usually about 1mm in diameter.
  • You can’t over apply nematodes but, if you have any left over after applying at the correct rate, treat adjacent beds and pots.
  • Application with a garden hose is not recommended for some applications, for example caterpillars or treating vine weevil larvae in pots. However, a garden hose is very useful for treating a large area of soil or lawn.

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