LARVANEM contains nematodes that are used for the biological control of larvae and pupae of the black vine weevil and other beetle species. The nematodes are effective as soon as the soil temperature reaches 14°C. The soil must be moist at all times. This product can be applied both indoors and outdoors. The product should be dissolved and diluted in water, after which it is distributed over the soil. The most common package of LARVANEM contains 50 million nematodes, which suffices for 50 – 100 m² . In addition, a bigger package of 500 million nematodes is available for our business customers. This is sufficient for 500 – 1000 m².

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The product LARVANEM contains the nematode Heterorhabditis bacteriophora. DThese nametodes can be used for the biological control of larvae and pupae of the black vine weevil and other beetle species. The larvae and pupae of beetles live in the soil, while adult beetles reside aboveground.

How does LARVANEM work?

After the nematodes have been distributed over the soil, they start to look for host larvae, which they will enter through openings in the body. They transfer bacteria which infect and eventually kill the beetle larvae. Infected larvae discolour from white to pink/red and stop feeding from plant roots. The nematodes are effective against beetle larvae and pupae and have no effect against adult beetles. Both before and after the distribution of the nematodes, the soil needs to be moist. The nematodes require a moisty environment to be able to move through the soil. Under moist circumstances, the effectivity exceeds 95%. The soil temperature needs to be at least 14ºC. By targetting the larvae and pupae of beetles, development of adult beetles is stopped and no new eggs will be deposited in the soil. This leads to a reduction of the pest population.

How to combine LARVANEM

Beetles can also be controlled with ENTONEM. This product is effective already at a soil temperature of 8°C and can therefore be used in early spring. ENTONEM targets beetle larvae and is not effective against beetle pupae. If the conditions are right, LARVANEM is preferred.

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Additional information



Shelf life

several weeks at 6°C

Delivery time

24-48 hours


vine weevil



Type of product


Unit size

50 M, 500 M

Where to apply

hobby greenhouse, indoor garden, ornamental garden, public park, vegetable garden


April - May
August - September

T = 14 - 33 °C (soil temperature)

RV = above 80%

indoor garden
hobby greenhouse
vegetable garden
public gardens
ornamental garden

Use one box of 50 million nematodes for 50 - 100 m² soil surface.
Heavy infestation: repeat treatment one time.
Repeat again when larvae of the black vine weevil are present in the soil during the next season.

User manual

  • Add the contents of the package in a bucket with 5L water (15-20°C).
  • Stir thoroughly and let it settle for 30 seconds. Stir again.
  • Dilute: add 0,5L of the nematode mixture to 9,5L water.
  • Make sure to stir properly during the whole process.
  • Diluting the whole package results in 100L of nematode mixture.
  • Distribute the nematode mixture over 50-100m2.
  • Use the whole package in once, because the distribution of nematodes is not homogenous.
LARVANEM nematodes against beetle larvae