THE. EXTERNAL PARASITES OF POULTRY. 109 



reduced to two or three a year for the adult stock, and as many for each brood of young stock. 



In this lesson I have mentioned only a very few insecticides, none but articles commonly used 

 for other purposes, kept on hand in many homes, and easily obtainable everywhere. Chloro- 

 naptholeum is a special preparation, but as far as its use in the manner described is concerned, 

 seems to me to be just the same as sulpho-napthol, which I have since used sometimes in the 

 same way with the same results, and I suppose that there are other preparations oi the same 

 character which may be substituted. The point I want to impress is that a common article of 

 household use, with waier, everywhere abundant is an effective remedy for mites, and an inex- 

 pensive one. Hence there is no occasion for delay in treatment while waiting for some special 

 insecticide ordered only when actually needed. 



It would be possible to greatly extend this lesson, giving a long list of insecticides, both 

 proprietary and home made, but of these I shall say nothing here except that if convenient any 

 standard insecticide may be used, provided it is applicable for the special purpose for which an 

 insecticide is wanted. For adult fowls use a powder, if it seems necessary to give them indi- 

 vidual attention. For chicks use a powder, treating each brood as a whole. For lice and 

 mites in coops and on fixtures, use a liquid, applying with spray, brush, or broom as most con- 

 venient. In every case be thorough and persistent. Let the intervals between treatments be 

 short, a week or ten days for lice to which powder is applied, and two to four days for liquid 

 appliances. 



Don't keep up a constant warfare on possible parasites, riot knowing whether they are there 

 or not, but keep a sharp lookout for parasites and signs of parasites, and when necessary go> 

 after them aggressively. 



