Dear All, Thank you for the responses! I finally went out to grany's garden, becouse the irises (Spuria-hybrids, ochroleuca subsp. gigantea, crocea were infected) were there in the winter and in spring. I made additional pictures too. And I double checked the leaves, and saw that they were eating the leaves downwards, but they didn't reached the rhizome. I've saved all the existing larvae and pupa. I do not know if maggot is the correct english word for it, but they look like this ( http://kapitális.hu/e107_images/custom/…<http://xn--kapitlis-dza.hu/e107_images/custom/…>) just smaller, and a bit yellowish. Last stage larvae are around 4 mm long and 1 mm wide. The pupa is 3 mm long and 1 mm wide. Larvae: http://picasaweb.google.hu/lh/photo/… Pupa: http://picasaweb.google.hu/lh/photo/… On friday I'm going to the Horticultural University's Entomology Department, they have a nice series of books on horticultural pests, maybe I can find it there. I'm 100% sure it is some kind of a fly. I don't know when will they turn to a fly, but as soon as they do I'll let you all know and we will look for the ID. Interestingly other spuria sectio members like I. graminea and I. lactaea, Iris 'Dardanus', I. cristata, reticulata irises and pogon irises were not infected. Now I know why exportes have to wash all roots and cut the foliage back... Unfortunately inside the EU it is not necessary so nobody do that. Bye, Jan
