38 



INSECTS AFFECTING THE APPLE. 



the present pest, the same spraying may be made to 

 kill both. By destroying the progeny of the eggs in 

 this way, the crop of egg-laying specimens will be 

 reduced, but it will not necessarily prevent the hop- 

 pers which develop in neighboring localities from in- 

 vading the orchard to deposit eggs. When possible 

 infested twiers should be cut out and burned. 



INJURING THE LEAVES. 



The Apple Aphis. 



Aphis mail. 



During the spring and early summer, one often 

 finds the leaves and tender twigs of apple covered 



with small green lice or 

 aphides. These are the 

 Apple Aphis. They injure 

 the trees by sucking the 

 sap through their tiny 

 beaks. So far as we now 

 know it, the life-history of 

 tl Lese insects is as follows- 

 The lice hatch from eggs 

 in spring as soon as the 

 leaf-buds begin to expand' 

 and increase with marvelous rapidity, so that almost 

 as fast as the leaves develop there are colonics of the 

 plant-lice to occupy them. They continue breeding 

 on apple until July, when they largely leave the 



Fig 13. Apple Aphis. 

 Much magnified. 



