Leek Moth Cocoon

We had big problems with leek moth Acrolepiopsis assectella last year so protected with enviromesh this year. However, a few moths clearly got in or at least their larva managed to find our leeks. We started seeing some damage - with trails in the leaves. With a bit of searching we found the cocoons - intricately woven but not welcome on our allotment!

People say that you can cut the leeks/onions back and throw away the tops, but better to get rid of the critters before they start the lifecycle again. See this site for a factsheet.