Heterorhabditis bacteriophora

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

  • Beetles (Coleoptera):
    • Weevils (Curculionidae): Black vine weevil (Otiorhynchus sulcatus) and other Otiorhynchus spp.
    • White grubs (Scarabaeidae): European chafer (Amphimallon majale); Summer chafer/ June beetle (Amphimallon solstitialis); Amphimallon aestivus; Common cockchafer (Melolontha melolontha); Common garden chafer (Phyllopertha horticola); Phyllophaga spp.; Welsh chafer (Hoplia philanthus) and other Hoplia spp.; Japanese beetle (Popilia japonica); Oriental beetle (Anomala orientalis); Asiatic garden beetle (Autoserica castanea); Dune chafer (Anomala dubia); Brown chafer (Serica brunnea); Anoxia villosa


Category: Product ID: 2404


  • Dung beetles (Aphodius spp.)
  • Leaf beetles (Chrysomelidae): Flea beetles (Phyllotreta spp.)
  • Caterpillars (Lepidoptera):
  • Common swift moth (Korscheltellus lupulina)
Mode of action

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.

Product specifications
Pack size
  • 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.
Developmental stage Infective third-stage larvae (L3).
Concentration 86% Heterorhabditis bacteriophora – 14% inert carrier.
Directions for use


  • 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 five 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 0.3 mm (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 (5 hours). Do not store mixed suspensions
Product handling

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

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


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