THE CAMELLIA AND ROSE SCALES. 17 



THE CAMELLIA SCALE. 



Aspidiotus camelliae, Sign. 



Early in the year a correspondent forwarded leaf-buds of the 

 Camellia with the following note, " I notice that all the new buds 

 are dead and falling off. I cannot find any insect or grub inside 

 them or on any other part of the plant. Can you inform me 

 what is the cause and suggest a remedy ? " 



The trees were inspected and the buds were found to be 

 attacked by a scale insect, which Mr. Robert Newstead, the chief 

 authority on these insects in this country, has kindly identified 

 as the female of Aspidiotus camelliae, Sign. 



All the buds were picked off and burnt, and the trees were 

 well sprayed with soda and potash ; no scales have since been 

 observed. 



THE ROSE SCALE. 



Aulacaspis (Diaspis) rosae (Bouche). 



Many correspondents complain of the abundance of this 

 pest during 1904. 



The following account of the life-history, I take the liberty 

 of quoting from Mr. Robert Newstead's Monograph. 



" Egg-laying commences in August, and the larvae appear 

 soon afterwards, but are most abundant in the middle of Septem- 

 ber, and may then be found in a more or less active condition. 

 Before winter sets in, the male larvae effect their first moult, and 

 a small portion of the puparium is formed ; but the female 

 larvae do not moult until the following spring, and may be found 

 throughout the winter either permanently fixed or active even 

 during severe frosts. In early spring the male puparium is 

 completed ; subsequently pupation takes place, and the perfect 

 males may be looked for from the middle to the end of May, 

 the time of appearance varying according to the season. * * 

 The final moult of the female is effected either immediately 

 prior to or after fecundation, at which stage the puparium is 

 small. * By the end of summer it is completed, and will 



then be found to contain its imprisoned female, together with her 

 batch of pale crimson eggs ; later, in winter, her dead shrivelled 

 body and the white, effete egg skins, with an occasional larva." 



REMEDIAL MEASURES. 



Spraying with paraffin emulsion about the middle of Septem- 

 ber, three or four times, at intervals of two or three days, arid 

 again in the spring, is the most effective remedy that I know of. 



THE MUSSEL SCALE. 



Mytilaspis pomorum, Bouche. 



Many inquiries have been received respecting the treatment of 

 this scale, and some of the apple twigs sent in have been the 

 worst I have seen. 



