Insects Injurious (o the Cherry. 



197 



THE CHERRY BLACK FLY. 



( Mi/ziis eci-imj , I'al I, ) 



Well kuoM-ii to ever>' cliervy grower is the JJlack Fly, not only 



ill this emmtry, Ijiit all over Europe, America, Africa, Australia (4) 



aud IvTew Zealand. 



The black aphis of tire cherry swarurs over the shoots (G) auil 



gets into the leaves, causing tlienr to curl up. So tldck ilo the\' 



become some seasons 



that they not onlv 



destroy the leaves, but 



kill the ends of the 



shoots. Sometimes the 



leaves do not curl at 



once. Filch refers to 



this aphis in America, 



and records as many as 



I'.JO ranged down the 



mid rill of one leaf. 



^Moreover, they ex- 

 crete a large quantity of 



very gummy honeydew, 



and this falls on the 



fruit aud ruins it. The 



black fun g u s g r o ^^' s 



rap)idly on the honeydew 



of this dolphin, aud this, 



with their exci'emeut, 



soon ruins the i.'rop. All 



\'arieties of cherries are 



attacked by it all over the kingdom 



and black currants. 



On the large cherry trees in Worcestershire, Mr. liallard of 

 Eardiston informs me they do not look upon it as a serious pest, 

 yet one sees the top shoots dying from its attack. It is mainly on 

 wall fruit aud on young trees that it does much damage, especially 

 to the morello cherry. 



Ijotli sweet and sour cherries are used as the host plant. It 

 is also recorded from peaches in ^Vustralia (d) and on the plum m 

 America by Thomas (1). Ants are very abundant amongst colonies 

 of this aphis. 



!/•'. Fjlrmh'n. 

 ■ilxl) us i-lIEKIiV >]lMriT, 



It also occurs upon red 



