Nematodes for vine weevil grubs
Vine weevil grubs feed in the compost of pot plants and the soil under rhododendrons, azaleas and strawberries, where a cruising nematode can reach them. UC IPM advises a drench once the soil reaches 60 °F and moist soil for two weeks afterwards. The RHS times it for August or early September, before the grubs grow large, and UMass finds nematodes work well on spring larvae in container stock, with more varied results in the landscape. It does nothing to the adults notching the leaves.
Before you order
Sprayed or watered onto moist turf in late summer against young white grubs in the root zone. How it works, how to tell it has established and the supplier list are on the full Heterorhabditis bacteriophora profile.
How many do I need?
Area and infestation level in; quantity, cost and a weekly schedule out. Open the calculator →
Other controls for black vine weevil
- Ground beetlesWild predator · wild, attract it
- Rove beetlesWild predator · wild, attract it
- Metarhizium brunneum strain F52Microbial — insect-killing fungus · Label rate — granules 1.5–3 lb per cubic yard of potting mix or soil