Vine Weevil

Black vine weevil (Otiorhynchus sulcatus) is a major pest of nursery stock, pot plants and soft fruit production. Leaf notches around the edge of leaves indicates damage by adult weevils, this is when egg laying begins. Adults are all female, approximately 10mm long, and can lay up to 1000 eggs between June and October but over a longer period under protection. 

The larvae feed mainly on roots but they will also eat corms and soft fleshy stems. It takes several months to develop from egg to adult resulting in one cycle per year on outdoor crops but multiple generations may occur on heated crops. 

Vine Weevil Control Products

Exhibitline Sk/Nemasys L  Steinernema kraussei  
Contains microscopic nematodes which seek vine weevil larvae in moist soil and compost. Nematodes enter the weevil larvae and release a small pellet of bacteria that kills the host after a few days.

Autumn and spring are the main seasons for nematode application, although additional treatments may be needed for heated or protected crops. It is important that the soil or compost is kept moist (not water logged). Exhibitlline Sk /Nemasys L will work as low as 5°C allowing applications to be made whenever the pest is active.

Apply as a drench using conventional sprayer, dilutor, watering can or through most irrigation lines. In all cases remove any fine filters and ensure water temperature is between 5 and 15°C. 

Exhibitline Hb  Heterorhabditis bacteriophora  
Contains a different species of microscopic nematodes from Steinernema kraussei above. Under the right conditions Exhibitline Hb can be faster to act. Vine weevil larvae may turn a bright red colour when infected with Heterorhabditis bacteriophora.

Exhibitline Hb will control black vine weevil larvae (Otiorhynchus sulcatus) and other soil pests and is used for garden chafer control in lawns. Exhibitline Hb is more temperature dependant than Exhibitline Sk and ensure soil or growing media temperatures are between 12 and 30°C. 

Nematode Weevil Stop
This product contains the nematode Steinernema carpocapsae formulated into a gel and packed into the base of a wooden block. Placed in in the shade amongst plants the adult vine weevil seeks refuge beneath the weevil stop and becomes infected.