66 



SPRAYING CROPS 



weeks the reddish-brown moths come forth. These 



deposit the clusters of eggs, after which they soon die. 



There are a number of other caterpillars which 

 feed upon apple foliage, notably several species of 

 Leaf-rollers, the Yellow-xecked Caterpillar, the 

 Leaf-crumpler, the Leaf-skeletonizer, etc, all of 

 which are treated of in the author's Insects and Insecti- 

 cides, and all of which m_ay be destroyed by spraying. 

 The Apple-tree Flea-beetle is a small shining beetle 

 that is often destructive in the West. Spraying with 

 the arsenites checks it. 



Apple Aphis 



Much magnified 



The Apple Aphis — During spring the leaves and 

 tender twigs of apple are often covered with small 

 green lice or aphides. These are the insects known as 

 the Apple Aphis. They injure the trees by sucking 

 the sap through their tiny beaks. The lice hatch from 

 eggs in spring as soon as the leaf-buds begin to expand, 

 and they increase with marvelous rapidity, so that 

 almost as fast as the leaves develop there are colonies 

 of the plant-lice to occupy them. They breed on apple 

 until July, when they largely leave the trees, and 

 migrate apparently to various grasses. Here they 



