The larvae of the vine weevil do much more damage than is suspected, and although they are obviously not just pests of propagation areas they can nevertheless cause havoc in newly potted young plants. If any seedlings or young plants collapse suddenly, they have most likely been attacked by vine weevils. The adult weevil lays its eggs in soil or compost. The grubs that hatch are white with a brown head, and they feed on nearby roots. In recent years vine weevils have become more of a problem as they no longer show the pronounced seasonality in their life-cycle that had previously been assumed.
The only satisfactory method of control is to attempt to kill the grubs just after they hatch by routinely incorporating a powder insecticide in the compost when sowing and potting. The most effective insecticides are those containing bhc .
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