60 



CUERANT. 



development, on which some remarks are given under the 

 head of Pkim Aphis ; see also Index. 



Where much damage is being caused to Currant leaves by 

 the Green Fly, it is a good plan to break them off and burn 

 them. 



The infestation being beneath the leaves it is difficult to 

 reach it by spraying ; but in dry weather the application of 

 jjleiitiful waterijuis so as to keep up good growth of the leafage 

 is in itself a great check to aphis increase. Where leaf growth 

 is kept back by drought, aphides, as a rule, multiply much 

 more quickly than where growth is luxuriant. 



Currant Aphis is to be found also on Gooseberry leafage, 

 and also sometimes on the common or wild Guelder Eose 

 {Viburnum opulas). 



Currant Gall Mite. Phytoptus rihis, Nalepa. 



Phytoptus ribis, greatly magnified ; natural length of female 0-23 mm. (by 

 permission, after Dr. A. Nalepa). Black Currant twig with Mite Galls. 



