I live in N Wales and grow organic brussels every year on my four bed crop rotation. This year I had a healthy looking crop and then last week I went out to check the plants and to my amazement the whole lot was gone. One plant out of 10 has been stripped to the stems. I cannot see any aphids, caterpillars etc and the crops has been netted since planting.
I phoned three organic shops that I buy from and they told me that there is a problem this year and sprouts are in very short supply and a grower in Hereford reports none at all.
Does anyone know what might be causing this?