My husband set 19 winter cabbage plants which are now around 4 inches tall with a few leaves.
Their numbers keep dropping (now at 13 plants) due to some pest which chews into the stem just above ground level. The pest doesn't bother with the leaves and leaves them on the ground.
Until today, he has found the leaves on the ground with no sign of any stem or roots underground but, today, he has found one chopped off as usual but with the roots still intact.
Could anyone please throw light on what is doing the damage?