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I was wondering if anyone knew whether there is any point in using nematodes now, if I am not sure whether vine weevil is present or not?
We had an infestation last Spring and the nematodes wiped out the weevil.
If there are no larvae in ths soil, do the nematodes just die off, because they have nothing to eat, or do they stick around for a while?
Nematodes die off if there is nothing for them to eat. They also need warm soil for them to be active, and the soil is getting too cold now.
So, as already said, Provado is your best bet now.
I thought the nematodes ate every weevil in their path?!
Not ever used nemaodes, seems to me they are just like any other pesticides but just used underground. From the little I know they contain neo-nicotinoids, which I don't think are a good thing for the food chain as a whole as too Provado
Nematodes are little roundworms not poisonous chemicals
Ok I'm not sure, it's just they were included in a link in on this site about neo-nicotinoids.
When I click on the said link it brings me to here