In trials lasting 28 days, groups of 10-12 tick-infested cattle were treated with moxidectin injection (0.2 mg/kg body weight), moxidectin pour-on (0.5 mg/kg) or remained untreated. In trials lasting 140 days, cattle were treated with moxidectin injection, moxidectin pour-on or deltamethrin-ethion...

A total of 99 dairy farmers from 4 regions in Queensland was interviewed between October 1996 and June 1997 to determine practices for the control of cattle ticks and the attitudes of farmers to tick infestations. A personal interview was conducted with each farmer and answers to 134 questions were ...

In Queensland, Australia, 40 mid-lactation Holstein-Friesian cows, 100% lot fed, were assigned to 4 groups for 15 weeks. Two groups of 10 cows were infested each week with a gradually increasing number of B. microplus larvae, while the other 2 groups were maintained free of ticks. Milk yield and...

Tick fever was first identified in Queensland in 1891, and various control measures have been introduced since then to control the spread of infection, including mineral oil dipping, arsenic dips and DDT. The state is now divided into designated areas either free from ticks, infected, provisionally ...

Extracts prepared from the membranes of eggs (EM) and guts (GM) of B. microplus were used to immunize cattle, which were then infested twice with 20 000 larval ticks 1 week apart. EM antigens did not protect against challenge with ticks, despite high levels of anti-egg antibodies in the sera of the ...

Gut membranes of the tick B. microplus were extracted using a low ionic strength buffer and the soluble antigens were used to vaccinate Hereford cattle. Following either experimental infestation with 40 000 larval ticks or exposure to field infestation (in Queensland, Australia), ticks from...

The benzoylphenylurea acarine growth regulator fluazuron (ACATAK) was tested in 3 trials in Queensland, Australia, between October 1991 and March 1993. It was applied at 1.5 mg/kg body weight with a dose volume of 3 ml per 50 kg body weight, in 2 strips from shoulder to loin on either side of the...

F₁ steers resulting from mating of Simmental or Hereford bulls to Brahman cows, or mating of Brahman bulls to Hereford cows, in 1981-83 were compared on a commercial beef property in central Queensland. Simmental-sired steers had higher (P<0.05) live weight gains after weaning and were heavier (...

The genetics of growth to 24 months, scrotal circumference (SC) at 24 months and temperament traits at 6, 12 and 18 months in 7 year groups of F₂et seq., 1/2 Brahman, 1/2 Sahiwal, 3/4 Brahman and 3/4 Sahiwal bulls were investigated. Cattle tick (Boophilus microplus) and buffalo fly (Haematobia...

Two consecutive calf 'crops' consisting of 141 ³/₄ Brahman/¹/₄ shorthorn cattle (i.e. 29 steers and 40 heifers from 1981 and 30 steers and 42 heifers from 1982) were assessed for resistance to B. microplus in May, July and October 1983. Although the level of expressed resistance to artificial...