Beetle Larvae (Chafer Grubs & Vine Weevil Grubs)
Soil-dwelling larvae feeding on roots, causing severe wilting and plant loss.
Chafer grubs and vine weevil larvae feed on plant roots below soil level. Symptoms include wilting, yellowing and sudden plant collapse. Grubs are C-shaped, creamy white and cause heavy losses in container crops, turf and ornamentals. Biological control relies on nematodes such as Heterorhabditis bacteriophora for chafer grubs, and Steinernema kraussei / Steinernema carpocapsae for vine weevil larvae.
Biological Controls for Beetle Larvae (Chafer Grubs & Vine Weevil Grubs)
The species below are examples of beneficial organisms commonly used against beetle larvae (chafer grubs & vine weevil grubs). Recommendations are based on published biological control information and practical IPM experience. Always confirm suitability for your crop, growing system and local conditions before use.
Heterorhabditis bacteriophora + Steinernema kraussei
Environment: outdoor
Temperature Range: 5.0 – 25.0°C
Rate: As per chafer and vine weevil nematode programmes
Frequency: One or two applications per season
Larval complexes of beetles in soil treated using the same nematode programmes as chafer grubs and vine weevil.
Further BioWiki Reading
For more background on pest biology, beneficial insects and environmental factors, use the BioWiki alongside this practical control guide.
Related Biological Solutions
Growers dealing with beetle larvae (chafer grubs & vine weevil grubs) often also monitor these pests as part of a complete IPM programme: