Insects, etc., Injurious to Currants. 217 



they commence to breed in numbers, owing to their being hidden, and 

 more or less protected in the hollows of the blisters and under the 

 curled-up leaves. The galled patches are chiefly noticed on the 

 upper surface of the leaf, where they are blister-like ; below they 



[F. Edenden. 



Fltt. 163. RED CURRANT SHOOT WITH DENSE CLUSTER OF CURLED LEAVES 

 DUE TO APHIS ATTACK. 



are concave. In this cavity the aphides live and breed, the area 

 of the diseased patch increases as they develop. The leaves so 

 attacked shrivel away, the fruit often falls owing to loss of sap 

 long before the leaves die. These red blister-like patches are not 

 caused by the aphides. I have frequently during the last few years 



