084 THE BOOK OF GARDENING. 



Eight {Diloba cceruleocephala), in consequence of its markings on 

 the fore-wings. The moth itself is i£in. in wing-expanse, and flies 

 in September. The caterpillars emerge in spring, and attack the 

 foliage. They are bluish-grey, with a yellow stripe on back, 



on 

 and another on 

 the side, a 

 bluish head, and 

 black tubercular 

 dots. Spraying 

 with Paris Green 

 is the best treat- 

 ment. 



The other 

 animal pests of 

 the Apple will be 

 found in the 

 Chapter "On 

 Pests Generally," 

 for the reason 

 that they do not 

 confine their 

 attentions to one 

 tree or plant. 

 They include the 

 Lackey Moth, 

 Vapourer Moth, 

 Winter Moth, 

 Codlin Moth, 

 Goat Moth, Wood 

 Leopard Moth, 

 Mottled Umber 

 Moth, Aphides, 

 American Blight, 

 Scales, Sawfiies, 

 Fruit-Tree Bark 

 Beetle, Shot-Borer 

 Beetle, Rose 

 Chafer, Cock- 

 chafer, &c. 

 Of vegetable pests of the Apple there are comparatively few, 

 though what they lack numerically they make up for in virulence. 

 Canker is the commonest of the fungoid pests, though the 

 average gardener seems averse to believe that Nectria ditissima, 

 and not soil influence, is responsible for the very familiar condition 

 popularly known as Canker. Dessert Apples of the best kind 

 seem to suffer the worst — Cox's Orange Pippin, Blenheim Orange 

 (so called), and Ribstone Pippin to wit. N. ditissima is a wound- 

 fungus, so that care should be taken not to injure the bark in 



Fig. 643. — Web of Caterpillars of Small 

 Ermine Moth. 



