Since I first blogged about an invasion of diamondback moths (kålmøll) two days ago, reports have been coming in across Scandinavia of the enormity of this invasion, even reaching the farthest north parts of the Norwegian mainland in Finnmark, the arctic city of Tromsø and Northern Sweden. In some places, it’s been too cold to start planting out vegetables!
There were more than a thousand moths in my garden yesterday and they were observed swarming over my perennial kales (Brassica oleracea), sea kale (Crambe maritima) and common wintercress (Barbarea vulgaris), none of which are likely to be severely affected.

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