Posted: 22/11/2015 at 15:02
Have been reflecting on the subject of the type of soil/compost.
When we first moved here the area which is now the Shady Bank had a very high level of organic content, not having been 'cultivated' or the fallen leaves cleared up for probably 30 years. That was when we found a lot of evidence of vine weevils and the Nemasys was first applied.
The following year we dug that bank over and extended it, building a retaining wall along it's length. We had at least a couple of tonnes of topsoil added and dug in before the bed was replanted. The topsoil was quite a gritty loam.
I wonder if the gritty soil has made the vine weevil larvae feel less at home and has contributed, along with the Nemasys, to the reduction in damage.