4 
14 EXTERMINATING THE TEXAS-FEVER TICK. 
Plan requiring four and one-half months.—The plan of rotation 
represented in figure 8 requires four and a half months for its com- 
pletion. Some time during the spring the pasture is divided in the 
middle by two lines of temporary fence 15 feet apart. The herd is 
first confined in field No. 1A. On June 15 it is moved from this por- 
tion of the pasture to the other portion, designated field No. 1B, and 
on September 2 is moved to field No. 2A. The cattle are permitted 
to remain twenty days on each of the fields designated 2A, 2B, and 3. 
At the end of this time (November 1) all the ticks on the cattle have 
dropped, and the herd is returned to field No. 1A, which in the mean- 
time has become free of ticks. Later, if it is desired, the cattle may 
be placed in field No. 4. They should not, however, be returned to 
any of the other fields or driven across them, since these are infested 
with ticks. Field No. 1B will be free from ticks July 1 of the follow- 
ing year, at which time the temporary double fence may be removed 
and the cattle allowed to graze over the entire pasture. The rest of 
the farm will be free of ticks by August 1. If found desirable, the 
herd may be continued longer in field No. 3, even as late as February 
15, the only objection to this being that it will break the crop rotation 
by preventing the sowing of oats in the fall. 
It is well, when practicable, to have double fences with an inter- 
vening space of 15 feet between the different fields in order to prevent 
the ticks getting from one field to another. If this is not possible on 
account of the expense and time required to build the extra line of 
fence, the next Lest thing is to throw up with a plow several furrows 
on each side of the dividing fences. 
When there are streams running through the farm or the slope of 
the land is considerable, so that ticks may be washed from one field 
to the other during rains, the fields should be so arranged or selected 
that the drainage is from field No. 1A to No. 1B, and from field No. 3 
toward fields Nos. 2A and 2B. 
Plan requiring eight months.—The plan indicated in figure 9 is 
begun fifteen days later than the preceding one and requires eight 
months for its completion. The pasture is divided as before. The 
herd is moved July 1 from field No. 1A to No. 1B, and on October 
15 is moved from there to field No. 2. The herd may be continued 
on fields Nos. 2 and 3 until February 15 in any way found most con- 
venient, since there is no danger of young ticks hatching during 
that time. The herd is moved not later than February 15 to field 
No. 4. All the ticks on the cattle will have dropped by December 
20, consequently the herd may be moved to field No. 4 as early as 
that date, if found desirable. 
By March 1 the original pasture is free and the cattle are returned 
there. Field No. 1B will be free of ticks by August 1, at which time 
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