55 
THE SHEEP TICK 
USEFUL INFORMATION 
This parasite is really the Ked and not a true Tick. 
It never leaves the sheep unless it passes from one 
individual of the flock to another. At the shearing it 
migrates in vast numbers to the lambs. 
The female Sheep Tick lays only three to five eggs 
each, at intervals of a few days, and by means of a 
sticky substance, attaches them to the wool. These 
“eggs” are really cases which contain embyro Ticks 
that are alive before being deposited by the mother Tick. 
Some 21 days after being deposited, the ends of these 
cases break away, when the young Ticks escape and 
at once commence their depredations in the fleece. 
The above facts are of great practical interest to 
Sheepowners. The shells of these pupa cases, or “ eggs," 
are impervious to the Dip, so that if it is not sufficiently 
lasting in its effects on the fleece, the young Ticks 
hatch out of them and soon reinfest the sheep as 
seriously as before dipping. 3 
Dipping preparations vary immensely in their lasting 
efíects—this variation extending from the day after 
dipping to six months or more, and with Merinos, 
often lasting till the shearing. 
Cooper's Powder is the most lasting of all Dips, 
and if used according to directions, neither young 
Ticks nor migrant Ticks can exist in a Cooper-dipped 
fleece for a long period after dipping. 
This is one of the reasons for the use of “Cooper” 
being greater than that of all other manufactured dips 
put together, { і lg р 
