Lecture 5 Flashcards
(24 cards)
What is another name for Haematobia exigua
Buffalo fly
Why are the lesions caused by Haematobia exigua a problem
Hide damage and welfare issues
Describe the morphology of Haematobia exigua
- Maxillary palps are longer than half the length of the proboscis
- Eyes are large, red
- Thorax: two dark stripes
- The wings are held in a āVā shape at rest
Haematobia exigua: what sex feeds on blood and how often
- Both sex
- 20-40 times a day
- Bites are painful
Explain the lifecycle of Haematobia exigua
- Adult flies live for about 10-20 days on a cattle host
- Permanently associated with the host - females leave only to lay eggs on fresh faeces
- Females require blood meals for egg production and lay abtches of 14-20 eggs/day under edges of dung, on crevices of the dun pad
- Lifecycle: 9-11 days
Epidemiology of Haematobia exigua
Northern australia
What is the host for Haematobia exigua
Cattle and buffaloes
Where do Haematobia exigua locate
- Found in larger numbers on withers, shoulders and flanks -> heave infestations can be found on the neck, back, head and legs
- Dont like dusty animals
Haematobia exigua: what are the population dynamics
- Numbers increase in December and are highest in summer and autumn
Haematobia exigua: how is it spread
- Spread throughout Australia occurs mainly by movement of infested cattle
When does Haematobia exigua travel
at night
What are the clinical signs of Haematobia exigua
- Feed on blood -> painful bites and irritation -> distress -> reduce grazing time
- Restlessness: animals toss head, swish tail
- Rubbing against trees - hide damage
- Skin lesions
What causes this
Haematobia exigua
What causes this
Haematobia exigua
What causes this
Haematobia exigua
What causes this
Haematobia exigua
What causes this
Haematobia exigua
How to treat and contol Haematobia exigua
- Elements of IPM ptogram
- Breed selection
- Seletion eithin breed
- Dung beetles
- Buffalo flies traps
- Chemical treatment
- Cull the allergic animals
- Non chemical contol should be used wherever possible
- Monitor the animals ant treat with cehmicals wher ethere are more than 200 flies/beef cattle and 30 flies/dairy cattle
Why are dung beetles a good control for Haematobia exigua
- Increase the dispersal of cattle dung -> reduce the number of buffalo flies
- Some parasiticies have toxic effect of dung bettle population
What are the traps for Haematobia exigua
- Buffalo fly traps
- Buffalo fly tunnle trap
- Buffalo fly brush trap
What is the most common control with Haematobia exigua
- Ear tags
- Use OPs and SPs and abamectin
- Rotate the families of drugs
- Ear tags must be removed as soon as past their protection time, generally 10-16 weeks after application
What are the methods of application for Haematobia exigua
- Dips
- Sprays
- Buckrubbers
- Dust bags
- Insecticidal ear tags
How to ensure resistant management with Haematobia exigua
- Know the chemical group
- Which group are effective
- Folloe application instructions
- Rotate groups not just products
- Remove eat tags at end of effective life
- Integrate with tick and worm control programs
