20 



Remedial Measure!. 



In a general way, what has been said of the oyster-shell scale 

 applies to this insect also ; but as the scurfy scale is much thinner, 

 winter applications may be also resorted to. Any of the caustic 

 mixtures corrode the scales very readily, and whenever such appli- 

 cations are used as against the San Jose or pernicious scale, similar 

 applications against the scurfy scale will be equally effective. It is 

 usually not so much that the eggs are injured by the application, but 

 the scales are destroyed and the eggs are washed out by rains and 

 carried to the ground. Even a thorough coating of whitewash will 

 in many cases destroy the insect, which is the most easily controlled 

 of any that occur in injurious numbers. 



THE ROSE SCAI.E. 



Diaspis rosw, Bouchfi. 



This is .a snow-white scale about one-tenth of an inch in diameter, 

 somewhat irregular in outline; on the whole, broadly oval in con- 

 tour. On a badly infested twig there will be seen, besides these 

 broad scales, many of lesser size — not quite so white, more oval in 

 form, and with the yellowish band or point projecting beyond the 

 scale line. We also find a series of much narrower scales, ridged in 

 the center, and these cover the male, all the broad scales being females 

 in every instance. This species attacks rose, blackberry and rasp- 

 berry, the rose being the most common host. It has a distinct 

 preference for plants grown in the shade, and particularly where, 

 besides being shady, the ground is also damp. 



Hibernation may be in any stage from the egg to the gravid 

 female, all stages being found during the winter months. By the 

 beginning of March few eggs remain, the larvae are generally covered 

 and the majority of all the insects are females ready to reproduce. 

 During May and June eggs and active larvae are most commonly 

 present, and there seems to be a continuous breeding throughout the 

 season without a regular division into broods. 



The larvae are dull orange in color, with well defined black eye 

 spots and well marked antennre and legs. Unlike most other scale 



