106 



The eggs of the a]i\>\e aphis are tlepositcd in the fall, usually ou the 

 extremities of the uew growth, or around the huds. Two thorough appli- 

 cations of the No. 1 spray, according to tlio directions given, or of the lye and 

 soap -wash (No. 15), will destroy the eggs, and this is by far the best method 

 of dealing with the pest iu the first instance. In a natural way the eggs hatch 

 out just when growth eommeuees in the spring, and the leaves of infested trees 

 soon become curled and roll nji, making it very ditlieult to reach the insect 

 with an.y spraying mixture. 



They multiply at an enormous rate, those first hatched giving birth to 

 living young which in their turn reproduce in the same way, and so on for 

 several generations, so that as fast as new leaves expand, they are attacked, if 

 the weather conditions are favourable to the aphides. 



For summer S])raying. any one of sprays Nos. 2, fl fir 7 will, if used as 

 directed in the earlier stages of attack, jirove effective; two sprayings are 

 usuall.v refjuired, and are better given with onl.v a short interval between them, 

 not more than three days. Care should be observed to make the sprayings 

 very thorough, as the wa.shes kill only by actual contact with the insects. 



During the sunnner winged broods of the jiests are born; these should be 

 looked out for. and prevented from establishing themselves b.v a timel.v u.se of 

 one of the spraying mixtures referred to. 



Black Cherry Aphis (Mil.:: us ccrasi) 



is very injurious to the new growth, especially on young trees. It multiplies at 

 an enormous rate in a similar manner to the last-mentioned pest. Badl.v 

 infested trees are often a source of attraction for swarms of flies and wasps, 

 which feed upon the sweet exudation from the bodies of the aphides. 



Prompt and thorough spraying in the early stage of the attack is necessary 

 to deal with this pest effectively. It is more resistant to the acticm of spra.vs 

 tlian the green aphis, but the same remedies should be used, and better results 

 will follow if the sjiraying mixture is made as hot as the leaves of the trees 

 will bear without injur.v. 



CuRR.iNT Arms (Miiziis rihiK). 



is yellowish in colour and is found on the \md<'r sides of the leaves of currant 

 bushes, whicli become curled, blistered and reddish in colour. They migrate 

 during the summer, but return later on, and their eggs are deposited ou the 

 stems, especially around the buds. 



Spray with the No. 1 mixture to destro.v the eggs iu the winter months, and 

 with either of spra.vs Nos. 2, C or 7 in the growing season, directing the spray 

 so that the under sides of the leaves are reached. It is most important that 

 the work should be done early in the season 'before the insects become too 

 numero\is, and the leaves roll up so that sprays caiuiot reach them. 



They are particularly subject to attacks by jiredaceous enemies, such as 

 (he soldier-beetle {Podabrus comes), ladybirds, etc., and are often completely 

 cleared off in this manner. 



