The Pamphlet Collection of Sir Robert Stout: Volume 14
Life History
Life History.
The perfect fly is greenish black, with a somewhat shiny appearance. It comes first at the beginning of May, and deposits eggs upon the underside of the leaves. When the larvæ are hatched they make their way speedily into the hearts of the stems. They are whitish maggots (Nos. 7 and 9). As the pupæ (Nos. 10 and 11) have been found in wheat stems in the middle of June, it is supposed that there are two broods during the year, and that the second brood again attack the wheat plants or grasses.