Thread subject: :: Gall on Cirsium arvense

Posted by Nikita Vikhrev on 22-08-2005 17:40

There is a lot of Cirsium arvense in the field near my countryhouse, and there is a lot of such galls on Cirsium arvense. Galls is about 30mm long. I red that development of Urophora cardui larvae take place just in Cirsium arvense. Please, is it the case or another insecta?