274 A TICK-RESISTANT CONDITION IN CATTLE. 



Evidence received from various sources. 

 In a letter dated April Utli. 1918, Mr. W. H. Davidson, 

 of •' Wilmont,"" Tambourine Mt., wrote that he had had 

 experience similar to Mr. Hull in possessing practically 

 tick-free animals shewing vesicles on the escutcheon. These 

 cows were '' close-coated, short-haired, si iky- skinned, red 

 brindle animals in good condition, gentle tempered and when 

 at their best giving up to 14 quarts of rich milk per day. 

 They would belong to the class a dairyman would call 

 '■ good doers,"" of 8horthorn-Jersey- Ayrshire cross."' 



Mr. Oxenford, of Oxenford, South Coast Line, called on 

 May 16th and gave the follownng infoimation regarding^ 

 his experience with tick-resistant stock. 



A cow of his escaped into the hills and when recovered 

 some time later, both she and her calf, which had been 

 born in the meantime, were found to be tick resistant. 



His next experience was with a mob (16 head) of young- 

 stock, all of which were resistant, purchased some years, 

 ago from Mr. W. Lane, Wonga Wallen, via Upper Coomera. 

 These animals were sleek- coated grade Jerseys. They stood 

 the tick season and were never dipped. The majority 

 were disposed of, but three were retained, all of which 

 carried a few ticks but never became worried. They were 

 dipped with the others. Nothing was known aboxxt their 

 calves and an exudate had never been noticed. 



Mr. Oxenford also informed us that Mr. Lane's method 

 of raising resistant stock was to allow them to become tick 

 worried for their first year. The latter considered that if 

 cattle were once dipped their resistance was destroyed. He 

 did not practise vaccination. 



During an interview. May 9tli, 1918, Mr. R. Cross, 

 Graceville, stated that some five or six years ago he had 

 reported the presence of tick resistant stock to the Agri- 

 cultural Department, whereupon Mr. Cory visited his farm. 

 A number had remained free from ticks for three years 

 previous to Mr. Cory's inspection and had not been washed 

 or dipped during that time nor were they so treated up till 

 the time Mr. Cross sold his herd two years later. Others 

 were very ticky in spite of washing. The first two resistant 

 animals were Roany and Roany's daughter. Mr. Cross 



