RAMULARIA 477 



from the West Indies, have now shown this disease, it is pro- 

 bably present in some abundance. Externally the infected 

 seeds show no sign of injury, but after being soaked in water 

 for twenty-four hours a white mould is observed when the 

 skin is removed. Mycelium white, filamentous, septate, 

 hyaline, 7-10 ^ thick; conidiophores ascending, sparingly 

 branched; conidia elliptic-oblong, 3-septate, 25-28x7-9^. 



Massee, Kew Bulletin, No. 6 (1907). 



Artichoke leaf blotch (Ramularia cynarae, Sacc.) often 

 proves very destructive to the artichoke both in Europe and 

 the United States. The leaves become more or less covered 

 with irregularly rounded, greyish blotches, 2-4 mill, in 

 diameter. These spots are often so crowded that they 

 encroach on each other. After a time the surface of the 

 blotches becomes covered with a delicate, whitish mildew, 

 which is the fruit of the fungus. The conidiophores emerge 

 in tufts through the stomata. When this stage is reached the 

 leaves become brown and die. When the leaves are seriously 

 attacked the plant fails to perfect its heads, which are arrested 

 and valueless. 



Conidia cylindrical, very variable in length, continuous, 

 i -septate, rarely 2-3-septate, 40X4 p ; conidiophores very 

 slender, some very short, others long and branched. 



The only remedy is to remove and destroy plants on the 

 first appearance of the disease. 



Prillieux, Malad. des Plantes Agric., 2, p. 353 (1897). 



Sainfoin leaf spot (Ramularia onobrychidis. Prill, and 

 Del.) forms clear, fawn-coloured spots with a darker margin on 

 leaves of Onobrychis sativa. 



Forming very minute, white, pruinose tufts ; conidiophores 

 simple, septate, about 30 X 3 /*, bearing at the apex a short 

 chain of conidia, elliptic-oblong, 2-3-septate at maturity, 



15-30X4-5*5 /* 



Ascochyta orobi (Sacc.J often accompanies the Ramularia 

 on the spots, and it is considered that probably the two are 

 stages of the same fungus. 



Perithecia lenticular, brownish-fawn colour, 120-150 JJL 

 diam., spores hyaline, i-septate, i6X5-6/x. 



Prillieux and Delacroix, Bull. Soc. Myc. France, 9, p. 272 

 (1893). 



