43 



First of all conidia are formed; these are hyaline simple spores. Later, perithecia 

 develop in the stromatic mass ; these are flask-shaped and are sunk in the stroma. 

 Asci are long and cyhndrical, 160 x 13", 8-spored; ascospores are brown and sphe- 

 rical, 13 X 10". 



In all cases of canker the smaller limbs should be removed and the large ones 

 scraped and painted to prevent re-infection. Diseased fruit containing the sum- 

 mer stages should be buried or burned. Winter applications of white-wash, and 

 summer apphcations of Bordeaux Mixture will be of great service in controlling 

 these serious enemies of the orchard. Steps should be taken also to protect the 

 south-west sides of the trunks from sun-scald injury, and to prevent careless bruis- 

 ing or abrasion of the bark. 



This subject is worthy of more careful study. 



