CONSPICUOUS SCALES ON THE BARK 



261 



Fig. 356. — The European Fruit Lecanium. 

 Enlarged to twice natural size. Orig- 

 inal. 



is really a part of the insect 



itself and is not detachable as 



with the San Jose or oj^ster- 



shell scales. 



The best remedial measure 



is a winter spraying with 



crude oil emulsion at 12 per 



cent strength or distillate oil 



emulsion at 5 per cent strength. 



Distillate oil emulsion is prepared by dissolving 8 pounds of whale- 

 oil soap in 3 gallons of hot water, adding 5 gallons of distillate oil and 



at once pumping the mixture 

 back on itself. To dilute for 

 a 5 per cent strength add 1 

 gallon of emulsion to 11^ gal- 

 lons of water. 



The Terrapin Scale {Euleca- 

 nium nigrofasciatum Perg.) 



The terrapin scale is nearly 

 hemispherical, about one 

 twelfth of an inch long, nearly 

 as wide and high, and reddish 

 in color. The surface is marked 

 with darker, radiating spots or 

 streaks, and usually there is a 

 series of shallow depressions 

 near the margin. The food 

 plants include peach, apple, 

 plum, cherry, quince, pear, and 

 various shade trees. 



The scale is difficult to kill. 



The best remedy is spraying with 



20 per cent kerosene emulsion in spring, just before growth starts. Do 



not apply so much liquid that it will run down the trunk of the tree. 



Fig. 357. — Terrapin Scale. Below, a 

 single scale, enlarged. Original. 



