hi all here in the Uk they fly from the end of May to maybe the first week in July. Flying is weather dependant and only happens on dry sunny days. The adult doesn't know what size of bulb the grubs will eat. I've seen them in bulbs the size of a large bulbocodium type right up to the largest Narcissus bulb. It's the dying leaves they look for so there is no point hiding the bulbs with dying leaves. The adults like to sun bathe on rocks and large leaves. Thats the best time to swat them especially when a male swoops in for a rough and tumble with a female. For protection I'm using an organo phosphate once a week. I spray all leaves from the end of April. Systemic insecticides like Provado should work provided you start spraying about six weeks in advance to allow the bulbs to soak up the pesticide. I now have lots of photos so if you want to see them email me The Narcissus fly should be renamed Amaryllid fly as the go for the whole family Mark N Ireland We've talked about this in the past. Dave Karnstedt provided a lot of information since it was a problem for him with all the Narcissus he grew so a search of the archives would provide more comments. We know it occurs in Ireland since the link on the wiki to the picture of the fly and a close up of the larva if from Mark Smyth and since he writes about Galanthus, this must be a genus they like too. -- I am using the free version of SPAMfighter for private users. It has removed 11299 spam emails to date. Paying users do not have this message in their emails. Get the free SPAMfighter here: http://www.spamfighter.com/len/