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I was successful this season with growing young salad veg in a new veg trig. I have now discovered vine weevil in the compost. Will they die over winter and not return or will I need to get rid of all the compost and get new compost. If I get rid of the compost should I take it to the tip and not use it anywhere else?.
I would get a big sheet of plastic or a tarpaulin and spread it out then spread the compost out on that and let the birds get at it - they'll eat the vine weevils for you. Then you can use the compost as a mulch on the borders.
I always use fresh compost each year for growing veg in a container.
In something larger like a raised bed I have a mixture of topsoil and well-rotted FYM and each year I top it up with more FYM.
I have just emptied some containers with pansies in and have found the compost crawling with vine weevils. I was going to start a new thread then found Dove had already given the answer I was looking for. Many thanks - off to find a large sheet of plastic
If your birds do not come and eat the grubs for you, you can spread the compost out thinly on concrete and then go over it with one of those Flame Gun Weed killing things. Or, if you have a steam paper stripper, that will work too. Sterilises the compost nicely so that it can be used as Dove says.
or you can use a nematode vine weevil killer, I've used it in the past when my greenhouse got infected. very effective