VETERINARY ENTOMOLOGY Development of Hydrotaea aenescens (Diptera: Muscidae) in Manure of Unweaned Dairy Calves and Lactating Cows

Development of Hydrotaea aenescens (Diptera: Muscidae) in manure of unweaned dairy calves and lactating cows.

In laboratory studies performed in the United States and Hungary, the dump fly Hydrotaea aenescens (Wiedemann) was reared successfully in manure of 1- to 8-wk-old dairy calves, and in manure from adult lactating dairy cows. Survival in manure collected from 1-wk-old calves was poor (7.2%), better in manure collected from 2- and 3-wk-old calves (53.5%), and best in manure collected from 4- to 8-...

Ophyra aenescens (L.) (Diptera: Muscidae) a new biological vector of Dermatobia hominis (L. Jr) (Diptera: Cuterebridae) in Minas Gerais, Brazil.

[Pachycrepoideus vindemiae (Hymenoptera: Pteromalidae) as parasite of Ophyra aenescens (Diptera: Muscidae) in Brazil].

The first occurrence of the parasitoid Pachycrepoideus vindemiae on pupae of Ophyra aenescens, a fly of medical-sanitary importance, is reported. A swine carcass was used as bait to collect the insects. In the study, 302 pupae of Ophyra aenescens (Wiedemann) (Diptera: Muscidae) were obtained, 6 (1.98%) of them yielded the parasitoid Pachycrepoideus vindemiae (Hymenoptera: Pteromalidae

Distinctive hydrocarbons of the black dump fly, Hydrotaea aenescens (Diptera: Muscidae).

Hydrotaea aenescens (Wiedemann), the black dump fly, is a potential biological control agent originally from the western hemisphere, now found in many parts of the Palearctic region except for the United Kingdom, where it cannot be imported for any reason. A complication of classical biological control is the problem of strain identification, as one must be able to somehow mark or follow a part...

Effect of Feeding Quickly Degradable Nitrogen on the Development of Ovarian Follicles in Lactating Dairy Cows

The objective of this study was to examine the effect of an excess intake of quickly degradable nitrogen (QDN) on ovarian follicle development. Twenty lactating dairy cows were fed mixed silage and concentrates twice daily. The control diet was a typical ration for high producing dairy cows in the United Kingdom (crude protein (CP)=17.5%; metabolizable energy (ME)=11.8 MJ/kg DM). The cows were ...