APRICOT DISEASES 



155 



REFERENCE ON SCAB 



Heald, F. D. Report of committee on fungus diseases for 1911. 

 Apricot scab or freckle (Cladosporium oarpophilum Theum) 

 Texas Agr. Dept. Bui. 22 : 159-160. 1911. 



CORYNEUM FRUIT-SPOT 



Caused by Coryneum Beijerinckii Oudem. 



. This disease is best known in California on the peach and is 

 referred to as the 

 California peach- 

 blight, shot-hole 

 and fruit-spot. In 

 that state it was 

 given special atten- 

 tion in the years 

 1907-1909. It has 

 also been noted in 

 New York. In for- 

 eign countries it 

 is not unknown, having 



FIG. 41. Coryneum-blight disease on apricot 

 fruits. 



FIG. 42. Coryneum-blight disease on 

 apricot leaves. 



been recorded from Australia 

 as early as 1882, and an 

 epiphytotic was reported 

 from Algeria in 1904. 

 Small, reddish spots at 

 first with light centers 

 then becoming dark-green 

 to black, are produced on 

 the fruits (Fig. 41). The 

 foliage is spotted ; the 

 affected areas are brown, 

 but soon these fall away, 

 leaving a shot-hole effect in 



the leaf (Fig. 42). Fruit-buds are sometimes killed as a result 



