Help , what can we do about these critters .
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Agree with silver Surfer, very likely to be Vine Weevil grubs. I also have the problem this year. They burrow into the tuber. I found a dozen when lifting them and found 6 when I checked on them again yesterday. Provado Vine Weevil killer is the poison that kills them.
Thanks everyone, you have confirmed my suspicions. Will buy a vine weevil drench and hope that I can save some of the corms especially as some are 20 years old and lke old friends . I have only had the problem the last 2years and have probably been making it worse without realising by tipping the old compost on to the garden.
Peat based ones are the worse for Vine weevil grubs.
Be careful with Provado, it still kills bees.
Berghill wrote (see)
Peat based ones are the worse for Vine weevil grubs. Be careful with Provado, it still kills bees.
There is a difference between Provado insecticide and Provado Vine Weevil solutions.
They are still both neo-nicitinoides.