44 FUNGOID DISEASES 



The germ tube is said to be only able to enter 

 the plant in the young stage. 

 Prevention . — 



1. Steep seed in copper solution (p. 28). 



2. Jensen's hot water treatment (p. 29). 

 Results from the treatment of the seed are by no 



means uniform. 



Note. — i. Rye smut caused by Ustilago Secalis is very rare. It 

 destroys the whole ear. 



2. Urocystis Agropyri forms black bands of spores on couch 

 grass, hungarian forage grass, etc. 



(^) Maize Snnit {Us til ago Maydis)- 

 None of the fungi above described cause such 

 malformations as U. Maydis- Not only the grain 

 but every part of the plant is attacked. First white 

 wrinkled patches appear, which swell, and later 

 burst, thus liberating the spores. It is definitely 

 known that the plant can be infected at a late stage 

 of growth as well as in youth. 

 Preventive Measures. — 



1. Sow grain from fields not badly infected. 



2. Remove by hand, and burn, the smut masses 

 before they burst. 



3. Avoid, as far as possible, planting maize on 

 fields where smut was serious the preceding year. 



(y) Brome Snmt ( Ustilago broviivord). 



While the above fungus may check the growth of 

 the undesirable grass {^Bromtts mollis) to some extent, 

 in those meadows where it is found in abundance, 



