Insects Injurious to the Apple. 



81 



Sideria achatana. Fab. 



The moth appears in June and July. The wing expanse varies 

 from 1 inch to | inch ; the fore wings are pale grey, with a 

 brown basal patch, a median brown area broken in the middle, thus 

 forming two spots, dusky apex and brick-dust red central spot ; the 

 hind wings uniformly grey. 



[F. Edenden. 



FIG. 

 A. Spilonota roborana. 



74. TORTRIX MOTHS. 



B. Tortrix podana. 



It is found along hawthorn hedges in the south of England. It 

 was sent me twice from Surrey in 1897 feeding in abundance on 

 apple. 



PREVENTION AND TREATMENT. 



We, unfortunately, cannot prevent the Tortrix attack as we can 

 the Winter Moth, and at present we know of no treatment which is 

 likely to destroy the eggs. 



We are bound to spray to kill the larva?, and to be of any help 

 this must be done before the larvae form those leaf-rolls or spin one 

 or two leaves together. About mid April seems to be the time when 

 we can catch most of these pests in the open, when they are small and 

 have done but little damage. Arsenate of lead has been found quite 

 successful, but two sprayings may be necessary, a second one in late 

 May for killing some of the last hatched caterpillars. 



The ordinary spraying for Winter Moth destroys the Tortrices at 

 the same time. 



REFERENCE. 



(1) Theobald, F. V. Micro-Lepidopterous Larvae on Fruit Trees. Journal 

 S. E. Agri. Coll. No. 6, p. 13 (Dec. 1897). 



G 



