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you are to fight, what your problem is, whether it is bushes^ 

 trees or vines. In spraying currant bushes, some have found 

 that they can better use a dry poison than a wet poison. I 

 shall not recommend any special make. It has been found 

 by some of the growers that paris green dusted on when the 

 dew is on the plant, is a good, method of handling insects on 

 vines and bushes. 



I am also going to tell you of some experiments that will 

 be tried this spring. I feel quite sure that a dry poison will 

 be experimented on. It has gone so far that now the dealers 

 are putting up arsenate of lead in dry form, with the idea 

 that it will be dusted on the trees. I speak of this to show 

 you that we are not by any means reaching the point of 

 fixed methods of handling insects and of spraying methods, 



1. Here Mr. Frost handed around photographs showing 

 the methods of spraying. 



One of these shows solid stream spraying. We are fast 

 coming to give up our ideas of fine sprays. The farmer may 

 not come to the solid stream spraying, as he cannot do it with 

 small apparatus. 



2. (Photogx'aphs of automatic sprayers used for large 

 growths). 



Poisons that require water as a carrier mean that we 

 must use some form of pump. The form that we use will be 

 determined by material, size of trees, natural conditions of 

 surface, etc. If we use miscible oils, which are coming into 

 greater use every year as contact poisons, use the mixture 

 with a small amount of rubber as possible. Some are using^ 

 metal throughout. That is the pump that we must use for oil 

 sprays. If lime-sulfur wash, then the rubber is required. 

 Some manufacturers are making pumps with porcelain lin- 

 ings, which withstand' better the lime-sulfur than the brass 

 outfits. 



Next comes size of plant or area, as outside of these two 

 materials any apparatus or form of pump may be used. The 

 fruit grower should watch the insect very carefully. He can 

 often use a small bulb in handling insects where the area is 

 small. 



3. (Photograph of knapsack sprayer). 



The knapsack sprayer is very valuable for the small 

 grower. 



4. (Photograph of small compressed air outfit). 



