REPORT OF THE APPLE AND PEAR CONFERENCE. 



55 



The American Blight is the work of Scliizoneura lanigera, an 

 insect closely allied to the aphis or greenfly of gardens, but 

 differing in the absence of the "honey-dew" secreting glands 



INSECTS CAUSING AMERICAN BLIGHT. 



possessed by the latter. When plentiful it proves very destruc- 

 tive, causing swellings of the external tissues resembling can- 

 kerous w^ounds. The insects take up their abode in the crevices 

 of the bark, from which they are difficult to eradicate. Soft 

 soap, Gishurst compound, or, better still, petroleum, will effects 



THE APPLE WEEVIL. 



a cure if rubbed into the crevices of the bark every time the 

 insects make their appearance during the course of the season. 

 Petroleum is the most effectual, and should be applied by means 

 of a hard brush, such as is used by painters. The insect hiber- 

 nates in the soil during winter if the trunk of the tree does not 



