That’s interesting. I’ve done that for other infestations such as ants and wood lice but maybe I didn’t allow enough time for vine weevils. I once put a vine weevil grub in a glass of water and watched it for a day seemingly unaffected. I will try two days or maybe a shot of washing up liquid in the water.
@Jess in the garden and everyone, a really neat answer is to plunge your pots in water for 2 days. I put my pots in a plastic trug with a good depth of water to submerge the actual pot and all soil. The grubs die. It's great and totally harmless to wildlife Spread the news, not the chemicals x
Same as Angela I've seen weevil grubs survive for a few days under water. I'm working on a plan to let sedum plants and similar succulent varieties dry out for a week or more at a time to see if that kills them. I don't seem to get problems with plants that over-winter in cold frames and greenhouses as long as the soil goes dry for a long period. If the grubs are well developed though they seem to get into the thicker roots looking for moisture which might keep them alive for longer.
If you can keep your head, while those around you are losing theirs, you may not have grasped the seriousness of the situation.
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That’s interesting. I’ve done that for other infestations such as ants and wood lice but maybe I didn’t allow enough time for vine weevils. I once put a vine weevil grub in a glass of water and watched it for a day seemingly unaffected. I will try two days or maybe a shot of washing up liquid in the water.