65 
Means of Prevention and Remedy of Warble Attack. 
The two methods of treatment by which Warble Fly attack, and 
consequent maggot infestation of the hide, may be very much 
lessened, even down to being of no practical importance, are— 
dressings to prevent the fly egg-laying on the cattle, and destruction of 
the maggots before they leave the warble swellings. 
In the following notes of various kinds of applications or 
treatment for the above purposes, those only are named which 
have been advised on good practical authority, and are known to 
answer. 
Prevention of Summer Attack of Warble Fly. —About four 
weeks after the maggots have been noticed leaving the backs of the cattle 
the summer attack from Warble Fly may be expected to begin , and to be 
great or small in amount according to the number of maggots which were 
allowed to live. 
In the following notes of applications or treatment of the 
animals, which have been found to prevent attack, it will be seen 
that there are a few special points acted on. These are— 1st, 
applying mixtures of such a strong smell as may be obnoxious to the fly 
and overpower the attraction of the smell of the animal; 2nd, applications 
which would stick the fly fast or kill the egg; 3rd, ivashes which would 
clear off the eggs or destroy them if laid on the skin, or kill the grub 
whilst near the surface; 4 tli, protection afforded to cattle by being housed 
at egg-laying time. 
The following observations were sent me, amongst other com¬ 
munications, by Mr. Hy. Thompson, of Aspatria, who has given 
especial attention to warble and its prevention :— 
“Respecting the application of anything to prevent the Warble 
Fly depositing the eggs, there are a number of matters of a tarry 
nature that might be applied, and nothing better than Stockholm 
or green tar itself rubbed along the cows’ backs before turning 
them out, which would last all the summer season, or applied in 
May or June between the top of the shoulder-blade and loins. 
This is the only part the cow cannot lick, rub, or lash with the 
tail; hence the only peaceable place where the fly can leave its 
egg. Or sheep-salve (bad butter and tar mixed with sulphur). 
About two applications would last a full season. Or the application 
of brine and the mixture I have already given you. [Noted below, 
E. A. 0.] Paraffin, kerosine, carbolic acid, phenyle, &c., are all 
too transient to be of much service, and would have to be applied 
frequently.” 
F 
