INSECTICIDES AND THEIR USES 43 



and known composition.' Among proprietary insecticides that 

 have been reported to be found by analysis of little or no value 

 or too costly are those bearing names suggestive of "sure pop," 

 "bug shot," "certain death," "kill-em-quick," and certain lice 

 and "vermin" exterminators, roach destroyers, etc. 



On this head it is advised that in view of the fact that so 

 many proprietary insecticides are either fraudulent or extremely 

 expeiisiz'e, considering the value of their ingredients, it would 

 be well to make sure of the composition and value of each 

 before purchasing. 



Among the most useful proprietary remedies are nicotine solu- 

 tions or tobacco extracts and powders which are not mixtures 

 or nostrums, but just what their manufacturers claim for them. 



INSECTICIDE APPARATUS 



In the application of insecticides different types of apparatus 

 are necessary, according to whether the material used is to be 

 applied dry in powder or as a spray. The types necessary for 

 the former are simple, the spraying devices are numerous and 

 many efficient sprayers and like mechanisms are on the market. 



For dry application, such as pyrethrum, sulphur, and Paris 

 green mixed with flour, powder bellows or atomizers costing 

 about $2 are much used, particularly for gardens or where small 

 areas in larger fields are infested. 



For spraying. — No stronger evidence of the progress in 

 economic entomology could be cited than tfie number of firms 

 engaged in the manufacture and sale of spraying apparatus. 



Such crude mechanisms as are for sale at from 75 cents to 

 $2 or $3, both imder the title of syringes and sprayers, can 

 scarcely be reconmiended for up-to-date work. They do not, as 

 a rule, produce a true sjiray ; they are too apt to gel out of 



'■ Such as paregoric, Rochelle salts, Seidlitz powders, and various extracts, 

 elixirs, tinctures, mixtures, solutions, anodynes, etc. 



