Studies on the Reproductive Biology of the Horn Fly, Haematobia irritans (L.), (Diptera : Muscidae) : I. The Ovarian Development of the Flies Collected from the Field

Publisher Website
Google Scholar
Abstract
The foundation of the reproductive biology of the horn fly is the morphological change in ovarian development in the course of time after emergence and oviposition. Experiments showed that the oocyte was differentiated from the nurse cells and the yolk protein began to be deposited 1 day after emergence. After each oviposition, a yellow body was formed at the base of each ovariole, so that the morphological change could be classified into 5 categories: newly emerged, nulliparous, uniparous, biparous and multiparous. Based on the relation between the ovary stages and age, it was estimated that the 1st oviposition began 3 days after emergence and that ovipositional intervals averaged 5.4 days. Slight differences were found in the number of functional ovarioles and the hatching rate of eggs reared and field-collected flies.