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Entomopathogenic nematodes

Heterorhabditis bacteriophora

Used for:

Weevils and other beetles

Quantities Available

Container Size

Packing Style


50 million - 1 sachet of 50 million in a box.
500 million - 2 sachets of 250 million in a box.
2,500 million - 10 sachets of 250 million in a box.



Side Effects & Compatibility
- Pesticides can have (in)direct effects on biological solutions.
- As a general rule for tank mixing, always add the nematodes to a fully filled tank containing the compatible product
- The product is safe for most beneficial insects and mites, but can have some effect on a few when in direct contact with foliar applied nematodes

When to use Larvanem?

Larvanem can be used for biological control of larvae of weevils and other beetles in a wide range of crops.

Beetles: Weevils, White grubs, Dung beetles, Leaf beetles

Caterpillars: Common swift moth

How does Larvanem work?

The nematodes enter the pest and release symbiotic bacteria into the pest's body cavity. These bacteria convert the host tissue into a food source, on which nematodes feed, develop, and reproduce inside the host. This kills the pest within a few hours to days after infection.

Visual effect
Infected pest insects in the root zone turn red to brown but may be difficult to find, due to rapid degradation.

Application Larvanem

- Remove the sachets from the box and keep them at room temperature for 30 minutes.
- Empty the contents of the sachets into a bucket containing at least 2 litres of water per sachet (water temperature: 15-20°C/59-68°F )
- Stir well and leave the contents to soak for 5 minutes
- Stir again and pour the contents of the bucket into the half-filled spray tank (except when tank mixing with a compatible product)
- Maintain agitation of mixture in the tank (e.g. with a recirculation pump)
- Fill the spray tank with the required amount of water
- If tank mixing with a compatible product, add Larvanem at the end to a fully filled tank.
- Apply directly after preparation of spray solution.

- Nematodes can be applied using a watering can, an airblast sprayer, through a sprinkler system, with a backpack sprayer, or a vehicle-mounted spray unit.
- To avoid blockage, all filters should be removed, especially if finer than 0.3mm (50 mesh)
- Use a maximum pressure of 20 bar/290 psi (on nozzle)
- The spray nozzle opening should be at least 0.5 mm (500 microns - 35 mesh) - preferably high flow rate cone nozzle types
- Continuous mixing should take place to prevent nematodes sinking to the bottom of the spray tank
- Avoid sprayers equipped with centrifugal or piston pumps.
- Water tank temperature must not exceed 25°C/77°F and pH must be between 4 and 8.
- Distribute the spraying solution evenly over the soil/media surface.

Application through irrigation systems:

Pressure-compensated irrigation systems are recommended. If not available, spray or drench applications are recommended. For injection through Dosatron/Venturi systems, please contact your local representative for specific advice
Spray the solution as soon as it is prepared and within a short timeframe. Do not store mixed suspensions


Storage Time After Receipt
See expiry date on the box. On average product can be stored for 6 weeks.

Storage Temperature
Refrigerate at a temperature of 2-6°C/35-43°F in a ventilated refrigerator/cold room.

Storage Conditions
Upon reciept, take boxes out of the insulating shipment packaging. Keep in a dark, ventilated refrigerator/cold room until use.


Larvanem is typically applied at a rate of 250,000 to 500,000 nematodes per m² (2.5 to 5 billion/ha). See the website for more information.

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