From humble beginnings as tiny little Seed Onions, they have enjoyed around ten weeks of growth on my plot. But as some followers will note, I have commented on their apparent strange behaviour for a few weeks now.
I consulted with other Allotment Holders who were able to tell me that I have Onion Maggots which is something no chemical treatment is available for domestic use. It was suggested that some of my onions may be alright to eat but I would need to carefully examine them to find signs of maggots as no spray would clear it away. I know I need to crop rotate my raised beds, and do not have full knowledge of what was planted there last year but disappointed that Onions will need to be grown under Micromesh or an equivalent to prevent the Onion Flies from coming onto my crops. I read a great fact sheet (from Canada) on the lifecycle of the Onion Maggot and will have to monitor the next few months as they can have three generations of maggots in one year!