INSECTS, DISEASES, AND CONTROL 287 



3. Spray Materials. — ilake a eolleolion of materials to be used 

 in spraying. Samples of these will perhaps be available at nearby 

 drug stores, or may be purchased from chemical companies which sell 

 separate ingredients and mixtures. Care should be taken to label 

 all very carefully and those which are poison should be sealed with 

 wax or paraffine to make them more difficult to open. Certain mix- 

 tures, as kerosene emulsion, commercial lime-sulfur and others, should 



Fia. 148. — An inexpenaive spray pump with two leads of spray hose. More useful 

 in the home orchard than in the garden. (New Jersey Station.) 



also be shown in the collection. Other materials for the collection 

 are arsenate of lead, Paris green, bisulfide of carbon, lime, flowers of 

 sulfur and others. 



Arsenate of lead may be dissolved for use at the rate of two 

 or three pounds to fifty gallons of water. Bordeaux mixture 

 or lime-sulfur mixture may take the place of the' water as a 

 combined insecticide and fungicide. 



Paris green, used by the spray method, may be mixed at 

 the rate of 8 to 16 ounces, and one pound of lime to fifty 



