REPORT OF THE SOCIETY 65 



fact is clearly shown by the following quotation :^^ "In the apple nursery of Mr. 

 E. D. Smith, Winona, there were some thousands of young seedlings. Very few 

 of these were affected with the blight. On being questioned concerning the 

 prevalence of aphids among the nursery stock, the manager stated that owing to 

 constant supervision the aphids had very little chance to make headway. Kero- 

 sene emulsion was always on hand, and as soon as aphids were noticed on the 

 stock every young tree affected was immediately dipped in the solution. Hence 

 by keeping the aphids in check the disease had been kept from spreading in the 

 nursery. The disease was prevalent in the immediate neighbornood of the 

 nursery in every direction." 



'* Jones, D. H. Bacterial Blight of Apple, Pear and Quince Trees. Ont. Agr. Col. Bui. 176, 

 pp. 31. 1909. 



