316 



PESTS OF ORCHARD AND SMALL FRUITS 



Fig. 485. — Adults of the Apple Aphis on twig, 

 larged and natural size. Original. 



En- 



of injur}^ may be observed on the expanding buds, on which clusters 

 of the hce are found, their work resulting in deforming the young 



leaves or the blos- 

 soms, or in consid- 

 erable injury to the 

 young fruit. 



The life histories 

 of these various 

 species are not the 

 same, in spite of 

 the similarity in 

 their superficial ap- 

 pearance and their 

 initial work. 



The Apple Aphis 

 {Aphis ponii) 

 passes the entire season on the apple. In the winter it is in the egg 

 stage, large numbers of the small, black shining eggs often being 

 found on terminal 

 twigs. The first 

 generations in 

 summer are wing- 

 less, but in later 

 generations 

 winged individuals 

 develop. This 

 species is charac- 

 teristically bright 

 green in color, 

 with black, rather 

 slender honey 

 tubes. It is one 

 twelfth of an inch 



long. Usually the lice observed on tender shoots and beneath curled 

 terminal leaves belong to this species or to the following. 



Fig. 486. — Eggs of the Apple Aphis on twig, 

 and natural size. Original. 



Enlarged 



