vine weevil in my tubs

I have three wooden tubs in my front garden. This year when I went to plant them up, I found them heavily infested with vine weevil grubs and larvae. Question is, what should I do now?

Obviously I must dump the contents but should I let the tubs stay empty for a while, sterilize or disinfect them or what?

Any advice would be appreciated!

 

what you need, my friend is a pack of these little babies!

http://www.defenders.co.uk/vine_weevil_control.htm

sorted - and no nasty chemicals!

 

You little darling! and so quickly answered!

I've ordered some already