58 DISEASES OF TROPICAL PLANTS CH . 



most important are G. amygdalinum, Brizi, of the 

 almond ; G. coffeanum, Del., of the coffee ; G. theae and 

 G. theae sinensis, Miyabe, of the tea ; G. musarum, 

 Cooke and Massee, of the banana ; G. piperatum, E. 

 and E. , of the pepper ; G. lagenarium, (Passer) Sacc. 

 and Roum., G. affine, Sacc., and G. bussei, of the 

 vanilla ; an undetermined species on Yantica ; G. 

 alborubrum, Petch, of the rubber ; and many others. 



The genus Septogloeum resembles Gloeosporium, 

 but the conidia spores are pluriseptate. It contains S. 

 arachidis, Racib, which attacks the peanuts (page 232), 

 and S. mori, (Lev.) Briosi and Cavara, which attacks 

 the mulberry (page 246). 



The genus Coryneum contains several important 

 species. The conidia are borne beneath the epidermis 

 of the host plant, which they eventually rupture. They 

 are oblong or spindle-shaped, yellowish and multicellular. 

 The most important are C. Beijerinckii, Oudem, of the 

 peach ; C. mori, Nom., of the mulberry (see page 245). 



The genus Pestalozzia also contains several species 

 which are the cause of diseases of certain plants. The 

 conidia are spindle-shaped and multicellular. The 

 median cells are brown and the terminal cells clear, 

 with one cell at the free end carrying several cilia-like 

 processes. The most important are P. guepini, Desm., 

 which attacks Camellia japonica, C. theae (tea), 

 magnolia, citrus, rhododendron, and hevea (see page 

 170) ; P. palmarum, Cooke, on the palms and tea (page 

 201) ; P. fuscescens, Sor., var. saccharii, Walker, of the 

 cane ; and an undetermined species on the cacao. 



The genus Cylindrosporium contains many species 

 which are the cause of plant diseases. The conidia are 

 filamentous, sometimes slightly twisted, and embedded 

 within the tissues of the host just beneath the epidermis, 

 which is eventually ruptured. 



Order 3. SPHAEROPSIDALES. This order is so named 

 because it produces structures which resemble the 

 perithecia produced by Sphaeriales. These structures 

 are known as pycnidia and contain spores which develop 



