Got a nasty case of Chafer Grubs
By Nariz
Spain 
The blighters have demolished my two rows of beetroot seedlings and, after digging, my partner destroyed 10 of the little *****! What's best for the soil to deter them? Anyone know before I lose all my precious parsnips too?
30 Jun, 2009
Answers
Harrod Horticultural supply a nematode, 'Chafer Grub Treatment'. May be your best bet.
30 Jun, 2009
yes i agree nematodes work on chafer horrible grubs I had a plague of rose chafers i watered in nematodes the next year they were fewer and there have been none since they work but are not an insant result alas
30 Jun, 2009
Thanks guys! Now I just need to translate all that info into Spanish and hope the large garden centre on the way to Santander has the right stuff.
1 Jul, 2009
Know anyone with a pet Rook?
Apart from that, very difficult as they could be anywhere in the soil.
Chemicals such as a Provado drench would kill them but probably best not use this on food crops.
Not sure if Derris is still about but prevention is better than cure I suspect.
30 Jun, 2009