A CALENDAR OF LIVESTOCK PARASITES 
By Maovrice C. Hatt, Chief, Zoological Division, Bureau of Animal Industry 
JANUARY 
Look for ear ticks and treat infested animals. 
Examine livestock for lice and mange mites. 
Make plans for taking good care of the young 
stock soon to be born. 
Animals badly infested with ear ticks (fig. 1) are likely to die late 
in the winter or early in the spring. 
If your stock is infested, clean 
out their ears of ticks now with a mixture of 2 parts pine tar and 1 
part cottonseed oil. Write for Farmers’ Bulletin No. 980 (14).? 
At this season of the year live- 
stock in temperate climates have a 
respite from parasitic worms to a 
certain extent, as freezing weather 
has an unfavorable effect on the 
development of the worm eggs and 
the young worms on the pasture. 
The parasites which are trouble- 
some at this season include lice and 
mange mites. These should have 
been taken care of last fall by 
dipping. 
The worm parasites will open 
their spring drive on livestock at 
the time when warm weather and 
Fic. 1.—Spinose ear tick, enlarged 
the livestock babies make their appearance. These babies will be 
the special victims of the parasites. 
Plan now to put the young 
livestock on safe areas and to give them special attention. 
1 Italic figures in parentheses refer to literature cited, p. 14 
97437°—28 
