626 Prevention of Damage to Hides, etc. [nov., 



Several other sheep parasites, such as keds, ticks and lice, 

 as well as the maggots of the sheep maggot-fly, also cause 

 serious injury to the skin and wool in a somewhat similar way. 



Broadly speaking, sheep dips are more or less effective 

 against all these parasites. For the destruction of keds, two 

 dippings at intervals of three weeks are necessary; for ticks 

 arsenical dips appear to give the most satisfactory results; 

 while any dip which is suitable for sheep scab is effective also 

 against lice. 



Full information as regards sheep-scab is given in Leaflet 

 61, while the general subject of sheep-dipping, both for sheep- 

 scab and for the destruction of other parasites, is dealt with 

 in Leaflet No. 145. 



Dipping is also useful against the larvae of the sheep 

 maggot-fly, but is not permanently effective in preventing 

 the flies from egg-laying or "striking." These maggots 

 are the cause of much distress and suffering to the sheep, as 

 well as of permanent injury to the wool and skin. The sheep 

 consequently thrive badly, and the farmer loses by the de- 

 preciation in value both of the animal and of its fleece. 



The measures recommended against this pest in Leaflet 

 No. 126 are as follows : — 



"(1.) Cleanliness. — Sheep should be kept thoroughly clean 

 about their hind quarters. A good measure is to clip the 

 wool of the tail and between the hind legs. The purpose is 

 to clear away any filth and to give as little opportunity as 

 possible for lodgment, for the flies have a keen sense of smell, 

 and are attracted to dirty places for their egg laying. Hence 

 it is that sheep suffering from diarrhoea are so often fly- 

 struck. 



"(2.) Destruction of Carcasses. — Carcasses of all dead 

 animals, including birds, should be burned or buried so that 

 they may not serve as breeding places for the fly. 



"(3.) Dipping. — As a preventive measure dipping is useful, 

 but as the effect of one dip does not last beyond a fortnight or 

 so, the dipping must be repeated. Sulphur is regarded as an 

 indispensable ingredient in any such treatment, the odour 

 keeping away the fly. Carbolic dips are volatile and are 

 valueless for this purpose. 



"(4.) Dressing. — Dress the neighbourhood of wounds with 



