scholarly journals 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

1984 ◽  
Vol 19 (3) ◽  
pp. 331-340 ◽  
Author(s):  
Katsuhisa KURAMOCHI ◽  
Yutaka NISHIJIMA
Keyword(s):  
Reproductive Biology ◽  
Ovarian Development ◽  
Haematobia Irritans ◽  
Horn Fly

Pyrethroid Resistance in the Horn Fly., Haematobia irritans (L.) (Diptera: Muscidae)

1984 ◽  
Vol 77 (5) ◽  
pp. 1095-1098 ◽  
Author(s):  
S. S. Quisenberry ◽  
J. A. Lockwood ◽  
R. L. Byford ◽  
H. K. Wilson ◽  
T. C. Sparks
Keyword(s):  
Pyrethroid Resistance ◽  
Haematobia Irritans ◽  
Horn Fly

scholarly journals Karyotype of the Horn Fly, Haematobia irritans(L.)(Diptera, Muscidae).

CYTOLOGIA ◽  
1994 ◽  
Vol 59 (3) ◽  
pp. 269-272 ◽  
Author(s):  
Rita M. P. Avancini ◽  
Richard A. Weinzierl
Keyword(s):  
Haematobia Irritans ◽  
Horn Fly

SUMMER TREATMENTS FOR CATTLE GRUB CONTROL AND THEIR EFFECTS ON HORN FLIES AND CATTLE WEIGHT GAINS

1965 ◽  
Vol 45 (1) ◽  
pp. 43-50 ◽  
Author(s):  
M. A. Khan ◽  
J. E. Lawson
Keyword(s):  
Average Daily Gain ◽  
Control Group ◽  
Haematobia Irritans ◽  
Horn Fly ◽  
Systemic Control ◽  
Weight Gains ◽  
Horn Flies ◽  
Daily Gain

Spraying yearlings with 2% Co-Ral in July was 100% effective for systemic control of cattle grubs (Hypoderma spp.). Spraying spring calves with 1% Co-Ral in August was equally effective, and gave better control (P < 0.01) than spraying with 1 or 2% Co-Ral in June or 0.5% Co-Ral in July. Co-Ral sprays were not suitable for horn fly (Haematobia irritans L.) control.Two per cent Sevin sprayed on calves in June or July did not control cattle grubs, and only partially controlled horn flies.Compared with the control group, the average daily gain was higher (P < 0.05) to weaning but lower (P < 0.05) in the feedlot in calves sprayed with 2% Sevin in June. Similarly, it was higher (P < 0.05) from birth to the end of the feedlot period in calves sprayed with 2% Co-Ral in June, but lower (P < 0.05) in calves sprayed with 0.5% Co-Ral in July.Mild toxicosis occurred in five calves sprayed with 2% Co-Ral in June, and subclinical toxicosis in calves sprayed with 1% Co-Ral in August.

scholarly journals Genetic analysis of the infestation of females of the Caracu cattle breed by Horn Fly (Haematobia irritans irritans) (L.) (Diptera, Muscidae)

2005 ◽  
Vol 28 (2) ◽  
pp. 242-247 ◽  
Author(s):  
Angelina Bossi Fraga ◽  
Maurício Mello de Alencar ◽  
Leopoldo Andrade de Figueiredo ◽  
Alexander George Razook ◽  
Joslaine Noely dos Santos Gonçalves Cyrillo
Keyword(s):  
Genetic Analysis ◽  
Cattle Breed ◽  
Haematobia Irritans ◽  
Horn Fly

scholarly journals Wolbachia Endosymbiont of the Horn Fly (Haematobia irritans irritans): a Supergroup A Strain with Multiple Horizontally Acquired Cytoplasmic Incompatibility Genes

2020 ◽  
Vol 86 (6) ◽  
Author(s):  
Mukund Madhav ◽  
Rhys Parry ◽  
Jess A. T. Morgan ◽  
Peter James ◽  
Sassan Asgari
Keyword(s):  
Cytoplasmic Incompatibility ◽  
The United States ◽  
Whole Genome ◽  
Evolutionary Analysis ◽  
Content Type ◽  
Wolbachia Pipientis ◽  
Haematobia Irritans ◽  
Horn Fly ◽  
Horn Flies ◽  
Horizontal Acquisition

ABSTRACT The horn fly, Haematobia irritans irritans, is a hematophagous parasite of livestock distributed throughout Europe, Africa, Asia, and the Americas. Welfare losses on livestock due to horn fly infestation are estimated to cost between $1 billion and $2.5 billion (U.S. dollars) annually in North America and Brazil. The endosymbiotic bacterium Wolbachia pipientis is a maternally inherited manipulator of reproductive biology in arthropods and naturally infects laboratory colonies of horn flies from Kerrville, TX, and Alberta, Canada, but it has also been identified in wild-caught samples from Canada, the United States, Mexico, and Hungary. Reassembly of PacBio long-read and Illumina genomic DNA libraries from the Kerrville H. i. irritans genome project allowed for a complete and circularized 1.3-Mb Wolbachia genome (wIrr). Annotation of wIrr yielded 1,249 coding genes, 34 tRNAs, 3 rRNAs, and 5 prophage regions. Comparative genomics and whole-genome Bayesian evolutionary analysis of wIrr compared to published Wolbachia genomes suggested that wIrr is most closely related to and diverged from Wolbachia supergroup A strains known to infect Drosophila spp. Whole-genome synteny analyses between wIrr and closely related genomes indicated that wIrr has undergone significant genome rearrangements while maintaining high nucleotide identity. Comparative analysis of the cytoplasmic incompatibility (CI) genes of wIrr suggested two phylogenetically distinct CI loci and acquisition of another cifB homolog from phylogenetically distant supergroup A Wolbachia strains, suggesting horizontal acquisition of these loci. The wIrr genome provides a resource for future examination of the impact Wolbachia may have in both biocontrol and potential insecticide resistance of horn flies. IMPORTANCE Horn flies, Haematobia irritans irritans, are obligate hematophagous parasites of cattle having significant effects on production and animal welfare. Control of horn flies mainly relies on the use of insecticides, but issues with resistance have increased interest in development of alternative means of control. Wolbachia pipientis is an endosymbiont bacterium known to have a range of effects on host reproduction, such as induction of cytoplasmic incompatibility, feminization, male killing, and also impacts vector transmission. These characteristics of Wolbachia have been exploited in biological control approaches for a range of insect pests. Here we report the assembly and annotation of the circular genome of the Wolbachia strain of the Kerrville, TX, horn fly (wIrr). Annotation of wIrr suggests its unique features, including the horizontal acquisition of additional transcriptionally active cytoplasmic incompatibility loci. This study provides the foundation for future studies of Wolbachia-induced biological effects for control of horn flies.

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