62 FUNGOID DISEASES 



It causes the blackening of the moist cloths of the 

 cheese-maker. 



P7'eventive Measures. — On account of the wide- 

 spread nature of the fungus and the uncontrollabllity 

 of the weather, little can be done to check this 

 ubiquitous pest. Crops in moist districts should be 

 cut early, and thrashed grain should be stored 

 perfectly dry. 



{(i) Leaf Brown of Oats i^Helminthospoy'iuni 

 teres, Sacc). 



Fungi Imperfecti ; Order : Moniliales. 



Resembles in many respects barley browning, 

 except that infection commences at the tip of the 

 leaf, spreading downwards. The conidiophores are 

 sino^le, the conidia smaller and have a greenish 



" nuance ". 



A species of Helminthosporiuni causes a blight 

 on the leaves of maize. 



{e) Grasses. — Small, raised, well-defined, oval 

 black spots, resembling in size and appearance " fly 

 droppings," are formed on the leaf blades of cocks- 

 foot and other grasses by the fungus Phyllachora 

 graminis. These black spots contain the peri- 

 thecia with their spores enclosed. Not of a serious 

 nature. 



Note. — Space will not permit of a description of other minor 

 fungus diseases of grasses and cereals. 



For diseases of plants coming under this section caused by insects, 

 see " Farm and Garden Insect Pests," bv Somerville. M.M. >k Co. 



