514 HORSE, SWINE AND POULTRY DISEASES 



ing is done in the evening, nearly all of the oil will have evaporated 

 by morning and there will be no blistering of the skin when the 

 hogs are exposed to the hot sun on the following day. So little 

 oil is used in the spraying that few of the eggs will be killed, and 

 the w T ork should be repeated at the end of a week, and again at 

 the end of the second week. If the work is thoroughly done, three 

 sprayings will be sufficient. If a spray pump is not available, the 

 hogs should be rubbed with a mixture containing two parts of lard 

 oil to one of coal oil, repeating twice at intervals of a week. The 

 sleeping places should be thoroughly cleaned, the bedding burned, 

 and the inside of the buildings thoroughly wet with coal oil. 



Even with the most thorough treatment it requires time and 

 patience to clean a drove which has become badly infested, but it 

 must be done if the hogs are to be kept in a thriving condition. It 

 is not difficult to destroy the larger part of the lice, but that is not 

 sufficient, for where there are even a few eggs left in the ears or 

 under the jowls of a single animal the pest will soon become as 

 bad as ever. (F. B. 100.) 



The hog louse is a common cause of thriftlessness in young 

 pigs and when numerous, tends to retard fattening in adult hogs 

 and injuriously affects brood sows and boars. It is advisable and 

 profitable to keep swine free from lice at all ages and stages of their 

 existence and development so far as possible. To this end their 

 houses, pens and sleeping places should frequently be cleansed and 

 disinfected, the woodwork whitewashed, the bedding material kept 

 fresh, clean and dry and the yards free from accumulations of 

 litter and filth. It is impossible to keep hogs free from lice with- 

 out maintaining sanitary conditions in their quarters and in at- 

 tempting to rid them of these pests the treatment must include not 

 only the hogs, but practically everything with which they come 

 in contact daily. 



To disinfect recently purchased hogs, that possibly may carry 

 disease germs or vermin into the herd, wash them in a warm 2 per 

 cent solution of coal tar dip and repeat the treatment in 10 days or 

 two weeks; or apply the solution freely w r ith a spray pump and 

 rub it in with a brush. The addition of flowers of sulphur at the 

 rate of 16% pounds to each 100 gallons of dip mixture renders the 

 solution more effective and such a combination solution should be 

 freely used for all forms of mange or chronic disease of the skin 

 in hogs. 



To destroy lice a mixture of equal parts of kerosene and ma- 

 chine oil, or one part of turpentine and two parts of machine oil, 

 should be applied to every part of the hog by means of a rag or 

 swab of cotton waste; or it may be applied along the back, from 

 ears to tail, with a common machine oil can and allowed to ooze 

 down the sides of the hog. Repeat the application in 10 days. As 

 a remedy for lice on black hogs crude petroleum oil is successfully 

 used in the University herd. It is mixed with an equal amount 

 of warm water and applied with a spray pump or brush. A repeti- 

 tion of the application, in 10 to 14 days, eradicates lice with cer- 



