LEAF SCALD 



277 



young shoots, and has been considered as causing the 

 spottiness and cracking of fruit, pears more especially. 

 Small red spots appear on the upper surface of leaves when 

 still young ; these increase in size and become brown, 

 having one or more minute black spots — the fruit of the 

 fungus — slightly projecting above the general surface. If 

 the spots are numerous, as is usually the case, and the leaf 



Fig. 73. — Entojnosporium maculatum. 1, quince leaf 

 diseased ; 2, spores of the fungus, x 300. 



young, it becomes altogether brown, shrivels, and falls off. 

 If the leaf is older, with rigid tissues, it retains its shape, 

 but falls to the ground. The spores, as shown in the 

 accompanying figure, have a very characteristic shape. On 

 the branches the spots are at first reddish and circulai? 

 elongating, becoming slightly sunken with a central elevation, 

 and blackish in colour ; these often coalesce to form 



