188 HOW TO GROW GOOD CORN. 



wheat, than the rust of any other plant would do so ; 

 for nearly all plants are affected with some kind or 

 other of rust. This epiphyte, too, is very different in 

 structure from wheat-rust. Still, that wheat growing 

 under a barberry hedge may be more blighted than 

 in the rest of the field is quite true ; and so it is with 

 wheat grown under any kind of hedge. Sigh fences 

 are known to favour wheat blights ; open, exposed, 

 well-cultivated positions, when not too elevated, and 

 without trees or hedges, being those in which the 

 best wheats are grown. 



8. Cladosporhwi lierbarum (Corn-ear Mould) is a 

 brown-coloured mildew, mostly occurring on the ex- 

 terior of the chaff-scales of wheat, but common to 

 many plants in a state of decadence. It consists of 

 greenish or blackish tufts, which appear on the out- 

 side of the chaff-scales of wheat under the two follow- 

 ing conditions : — 



On wet soils, where the ears appear to have been 

 prematurely starved. 



On dry sands, where long-continued drought has 

 caused some ears to wither and die before the seed 

 was fully formed. 



In both these cases w r e see that the plant has been 

 previously injured. The decay commences under 

 alternations of moisture and drying, and hence the 

 fungoid attack. Here, then, the conditions necessary 

 for preventing will be deep cultivation and a due 

 pulverization and mixture of the soils. 



9-12. Botrytis, fyc. (Mildew). — Under this head we 

 include a multitude of epiphytes, to which the terms 

 mildew, mealdew, mehlthau (Germ.) are applicable. 

 They appear to the naked eye as patches of white 



