13 



ROSE SCALE. 



Diaspis Rosse. (Sandberg.) 



Fisiii'L- Xo. 5. 



The rose scale is easily recognized from the other more common scales 

 by its giving the parts aflected a white, almost mildewy-like, appearance. 

 This is due to the massing together of the scales, which are pure white, 

 very thin, and like paper. (Figure No. 5.) 



The scale of the female is circular, snowy white (or according to Signoret, 

 yellowish white), with the exuviae, light yellow, and upon one side; the 

 first skin is naked, the second usually covered with secretions. Female is 

 elongated, resembling a mytilaspis more than a diaspis. The head and 

 thorax comprise the larger part of the body. The abdomen is very dis- 

 tinctly segmented, especially on the sides. Scale of the male resembles 

 that of other species of diaspis, in being, long tricarinated, and white, with 

 the larval skin at the end. The male is of a reddish white, with the wings 

 white, the veins of the wings rosy. The venta is a little darker. The style 

 equals the abdomen in length; antennee and feet yellowish, slightly pub- 

 escent. (Signoret.) The rose scale infests, besides roses, various fruit 

 bushes, especially blackberries and raspberries. 



Remedy. — For raspberries and blackberries the cutting down of the canes 

 to the ground should be adopted, and the stumps sprayed or washed with 

 one of the solutions recommended under the head of general remedies for 

 scale insects. 



