Vine weevil control – 10sqm

Out of Stock


Vine weevil feed underground on roots and stem-bases from mid/late summer through winter, severely weakening or killing plants. Mainly a problem in container plants, but can cause serious damage to some plants in borders and to strawberries. Larvae are ‘C’ shaped, cream coloured with a brown head.

Control with parasitic nematodes (Heterorhabditis sp.) Heterorhabditis-System provides a rapid, biological cure for vine weevil larvae in containerized and outdoor crops. It is based on a unique strain of the insect parasitic nematode Heterorhabditis megidis, which seeks out and destroys vine weevil larvae in compost.

Biology:Heterorhabditis-System is able to exert such rapid and effective control of vine weevil because of the way in which it works. When applied to the compost, the nematodes seek out larvae already present in the root zone. They enter the larvae through natural body openings or by penetrating the cuticle directly.

Once inside, they release symbiotic bacteria. A larva which is attacked will colour yellow to reddish brown and will die after about two days. The nematodes reproduce inside the insect and as it decomposes, a new generation moves off in search of further prey.


  • Ensure compost is moist before applying Heterorhabditis-System. Irrigate if necessary. The compost must not dry out at any time after treatment.
  • Compost temperatures should not fall below 12°C for 14 days following treatment. At compost temperatures above 30°C activity may be reduced.
  • Do not apply Heterorhabditis-System in bright sunshine.

The best moments for application are in dark weather conditions and at night. The following quantities must be observed:

  • Preventively: 0,5 million nematodes/m² (5.000 nematodes per liter pot soil)
  • Curatively: 1 million nematodes/m² (10.000 nematodes per liter pot soil)

The Heterorhabditis-System-solution may be poured, dripped on each plant individually or sprayed globally.


Heterorhabditis-System may be poured on each plant individually. Suspend one Heterorhabditis-System package of 50 million nematodes in at least 100 l of water (or at least 10 l of water for a package of 5 million nematodes). Calculate the number of pots or the surface to be treated by means of the recommended dosage.


In case of pot plants (o.a. Poinsettia, Cyclamen) Heterorhabditis-System may be dripped. In order to find out the required amount of Heterorhabditis-System, first the pot soil volume must be calculated. Calculate by means of the recommended dosage  the number of pots to be treated with one Heterorhabditis-System package. After application it is wise to drip some additional water as well, so that all nematodes end up in the pot.


Spraying may be done with ordinary spraying equipment (maximum spraying pressure 5 bar). Use a nozzle with an opening of at least 1 mm. Immediately after spraying, the crop must be rinsed with a great amount of water in order to make sure that the nematodes end up in the soil.

Time of treatment

For outdoor crops the time of treatment especially falls in April-May and August-September. For cultures in heated greenhouses this may be at any time of the year. Heterorhabditis-System remains effective until about 4 weeks after application. The control of larvae which have hatched after this period may be insufficient. It is recommended to treat new introduced breeding material with Heterorhabditis-System, because it may contain vine weevil larvae.

Instructions for preparation

Heterorhabditis-System is available in two different packages:

  • 5 million nematodes (sufficient to treat 5 m² curatively)
  • 50 million nematodes (sufficient to treat 50 m² curatively)

In case of spaying, all fine filters (with diameters <1mm) must be removed for the spraying system, so that the blocking of nematodes during application is avoided. Do not use centrifugal pumps for preparation. The effect of those pumps may be fatal to the nematodes.

Use entire pack contents at one time

  • Open the package carefully and empty it into a bucket with 10 l water with a temperature of 15 to 20°C.
  • Mix thoroughly
  • Pour the suspension carefully into the tank or watering can, in order to obtain a ready-to-use Heterorhabditis-System suspension.
  • Shake the tank regularly during the application to keep the nematodes in solution. Rinse the tank thoroughly after usage.

BC07 5 million pack (treats 10 sqm) £12.99

Please Note:
Biological Controls are only available to be sent to Mainland UK as they are live animals. Any further afield will compromise the performance and the quality of the product.

Ordering Notice:
We have to place our order for Biological Controls & Bumblebees at 9.30 on Friday mornings.  When our order is placed on the Friday morning your item will come into us the following week and we send it out immediately so it should be with you by Wednesday or Thursday.  If you have any questions please telephone 01302 327311 or email

Out of stock