CHAPTER IV 



APPLE INSECTS — APHIS, SCALES, AND OTHERS 



Plant-lice or Aphids 



Three different kinds of these small, soft-bodied sucking 

 insects may attack the opening buds, the foliage and sometimes 

 the young fruits on apple trees : --^ 



(Fig. 153). Often two species 

 of these aphids work on the 

 same tree in the spring. Nurs- 

 ery stock is frequently seri- 



X'-' 

 '••^^^. 





Fig. 153. 



•Aphid eggs on apple twig. Fig. 154. — Apple leaf aphis on quince. 

 142 



