149 



MR. C. K. SMITH: Last spring we set out a good many- 

 yearling whips, and cut them down to 20 or 24 inches and 

 left no buds, and as far as we could judge there was no aphis. 

 1 would like to ask where we got that infestation, which was 

 very bad throughout the season. It was the green aphis. 



PROF. FARLEY: I think you must have missed some 

 when examining the buds. 



MR. SMITH: There wasn't a bud on the tree. Of course, 

 there were dormant buds, but I mean to say there was noth- 

 ing like the buds on the mature trees, but we got plenty of 

 aphis. 



PROF. FARLEY: Were there older trees nearby? 



MR. SMITH: In some parts of the plantation. In som^ 

 parts the aphis cropped out half a mile away from any other 

 trees. 



PROF. FARLEY: You can get infestation from other 

 trees at considerable distances, which may have been the 

 trouble. 



MR. SMITH : This was over the whole piece practically 

 feimultaneo"sh'. 



PROF. FARLEY : It might be that your examination 

 was not complete enough and that there may have been quite 

 a large number of eggs that you missed. That is probably 

 the main cause. There must have been some eggs if you had 

 ,'in infestation over the entire orchard. 



MR. MUNROE :\IORSE: Don't they have any means of 

 passing from one tree to another? 



PROF. FARLEY : Yes. They could be blown from one 

 tree to another. 



THE PRESIDENT : I have every confidence in Mr. 

 Smith, but I think he overlooked a few eggs; and it doesn't 

 take very many to make a good-sized family. 



MR. MUNROE MORSE : Could they be blown in a wind, 

 or fly? 



THE PRESIDENT: I am not an expert entomologist, 

 but I don't think at that stage you get the Avinged form. I 

 thinks the eggs were there on the trees. He had the one year 



