INSECTS AND OTHER SMALL ANIMALS 



303 



destroyed by spraying with a kerosene emulsion made 

 according to the following formula : 



Hard soap, or soft soap, one pound 

 Kerosene, two gallons 

 Water, soft, one gallon 



Dissolve the soap in boiling water; remove the kettle 

 from the stove and add the kerosene while the water 

 is still boiling hot; churn the mixture with a spray 

 pump until it gets to be a soft, butterlike mass. For 

 use this may be diluted with five to ten times the amount 

 of water. Since the 

 members of this order 

 are not biting but suck- 

 ing insects, it is useless 

 to use poisons of any 

 kind on the leaves. 



Scales and Mealy Bugs, 

 There are different 

 kinds of scales that in- 

 fest orchard and other 

 trees, but the most de- 

 structive and widespread 

 is the San Jose scale, so 

 called because it first 

 appeared at San Jose, 

 Cal. This is a kind of 

 plant louse that usually 



remains On One portion 



of the stem of the tree, m - male scale ; / female scale = ? y un s 



. a, young insect. 



and, in the case of the 



female, does not move after it once settles down. It 



covers the stems with a whitish coating that might 



-y 



f- 



FIG. 155. San Jose Scale Insect. 



le = ? y 



Enlarged. 



