APHIDiiS. 



with sticky filth. Th's other currant aphis, Rhopalosifhuni 

 ribis^ does not emit honey dew. 



The action of Myzus cerasi upon cherry trees is the same as 

 upon currant bushes. The leaves are pierced by countless 

 beaks, or rostra, and the fruit is covered with honey dew. 

 Cherry and Currant Aphis [Myzus cerasi). 



It is almost impossible to use remedial measures for the 

 attacks of these insects upon currant bushes. The leafage 

 is so thick that spraying is a most difficult operation and 

 could hardly be performed so as to reach the aphides upon 

 the leaves within the bush, especially in the case of red 

 currant bushes. It might be attempted early in the season, 

 when the aphides are first discovered and the leaves not so 

 dense. After infestation black currant and red currant 

 bushes should be pruned more closely than usual. The 

 cuttings should be taken away and burned. Spraying with 

 kerosene emulsion might be tried, before the leaves appear, 

 upon bushes infested in the previous season, as it might 

 make the surroundings of the aphides unpleasant for them 

 when they come on the scene. 



Cherry trees fastened to walls may be easily sprayed, and 

 small standards also, either with garden engines or knap- 

 sack machines. Large trees would require special machines 

 with powerful pumps. The quassia and soft soap mixture, as 

 prescribed above, would be the best to use. Spraying 

 should be done early : as soon as aphides are seen. 



I. Apterous viviparous female. 2. Winged oviparous female. 

 3. Oviparous female. All much magnified. 



