590 THE FUNGI WHICH CAUSE PLANT DISEASE 



S. radicicolum Aderh ^^^ is reported by Aderhold as the cause of 

 death of roots of Prunus and Pyrus. 



Mastigosporium Riess (p. 588) 



Conidiophores short, stipitate, continuous, hyaline, conidia fu- 

 soid, large, 3-septate, hyaline, with apical and subapical bristles. 

 A small genus in part =Dilophia. 



Fusoma Corda (p. 588) 



Mycelium obsolete or poorly developed; conidia innate, fusiform 

 separate. 

 F. parasiticum Percival, causes a wilt of hops.**^ 



Ramularia linger (p. 589) 



Conidiophores fasciculate, simple or with short, scattered 

 branchlets, often flexuose, nodulose, or denticulate towards the 

 apex, hyaline or light colored; conidia acrogenous or acropleuro- 

 gynous on the denticulations, hyaline, sometimes subcatenulate, 

 oblong, cylindric, typically many-septate. 



About three hundred species. In part =Mycosph8erella. See 

 p. 243. 



R. tulasnei Sacc. on strawberry =Mycosph8erella fragariae. See 

 p. 244. 

 R. armoracise Fcl." 



Spots amphigenous, subochraceous becoming gray; conidiophores 

 fasciculate, continuous, subsimple, 40-50 x 

 2.5-3 m; conidia rod-shaped, obtuse, hyaline, 

 15-20 X 3^ /I. 

 On horseradish causing leaf spots. 

 R. tarazaci Karst. 



Hypophyllous, spots purple-margined, hyphae 

 35-45 X 2-3 n, spores bacillar, simple, straight, 

 hyaline, 18-30 x 2-3 ii. 



Fig. 395. — R. aimora- V> i i i- 



ciffi. After Sao On dandelion. 



''"'^°" R. spinacise Nip. is on spinach; 



R. betse Rost. on beet; 



R. necator Mas. on cacao; 



