212 



NEBRASKA STATE HORTICULTURAL SOCIETY. 



Of the so-called "insecticides" and " insectifuges " there are a great 

 many; some of which, of course, like a certain per cent of all other 

 patent nostrums, are worthless, and should not be bought or used. 

 There are a few of them, however, that are "genuine' 7 and can be de- 

 pended upon as being just what is claimed for them. Among these 

 latter we can rely upon Paris green, London purple, kerosene emul- 

 sion, Persian insect powder, bisulphide of carbon, and a few of the 

 alkali washes. None of these which I name are protected by patents, 

 nor do they contain constituents that are unknown to the user. Be- 

 sides, their comparative cheapness must go far towards recommending 

 them for general use. 



Of course, in using most of these insecticides, it is necessary to 

 proceed with caution, for otherwise danger may result both to the 

 operator and to stock, as well as to the tree or plant upon which they 

 are applied. 



HOW APPLIED. 



The method of applying these insecticides has much to do with their 

 efficacy upon the insects which are intended to be destroyed. It is, 

 therefore, quite as necessary for us to choose the best methods of apply- 

 ing the poisons as it is to secure the best and most sure insecticides. 

 A loose, careless application of the very best material will often prove 

 an entire failure, besides a waste of material and time ; whereas, if 

 properly applied with a good force pump in the form of a fine spray 

 the work will be all that could be desired. A very good pump for 

 this purpose is shown in Fig. 24. It is manufactured by the Goulds 



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HM 



Fig. 24. — Force-pump made for 

 applying insecticides to trees, etc. 



Fig. 25. — Showing use of force-pump for spraying 

 insecticides from wagon. 



