Chafer Grubs (Garden Chafer & Cockchafer)
Soil-dwelling white grubs feeding on roots in turf and nursery stock.
Chafer grubs, including garden chafer (Phyllopertha horticola) and cockchafer (Melolontha melolontha), live in the soil and feed on roots of turf, nursery stock and ornamental plants. Symptoms include yellowing, thinning turf and areas that lift easily due to root loss. Birds and mammals may cause secondary damage while feeding. Biological control relies on Heterorhabditis species nematodes applied to moist soil when grubs are small and actively feeding.
Biological Controls for Chafer Grubs (Garden Chafer & Cockchafer)
The options below are examples of beneficial insects and biological products commonly used against chafer grubs (garden chafer & cockchafer). Always refer to supplier guidance and product labels for crop safety and local registration status.
Heterorhabditis bacteriophora
Product: Exhibitline Hb
Environment: outdoor
Temperature Range: 5.0 – 25.0°C
Rate: 0.5–1 billion nematodes/ha
Frequency: Repeat annually at peak grub stage
Effective against chafer larvae in turf and amenity; ensure good soil moisture and apply in dull weather.
Related Biological Solutions
Growers dealing with chafer grubs (garden chafer & cockchafer) often also monitor these pests as part of a complete IPM programme: