Vine Weevil Nematodes Protect Container Plants and Borders from Vine Weevil Grubs
Vine weevil is one of the most destructive pests in UK gardens, and it does its worst damage underground and out of sight. The adult beetles are active at night from spring through summer, leaving characteristic U-shaped notches along the edges of leaves — a telltale early warning sign. But it is the larvae that kill plants. Plump, creamy-white grubs with brown heads, they feed on roots through autumn, winter, and into spring, often completely destroying the root system before the plant shows any outward sign of distress. By the time a plant wilts and collapses, it is usually too late to save it.
Container plants are at the greatest risk, heuchera, fuchsia, cyclamen, primula, begonia, strawberries, and rhododendrons are among the most commonly affected, because the confined root space gives grubs little room to avoid them. A single pot can harbour 20 or more larvae, and all adult vine weevils are female, each capable of laying hundreds of eggs from May through to October.
