60 



It is quite evident, from examination of wheat and barley 

 grains taken from fields infected by the Cladosporium herbarum, 

 that the fungus is upon them among the hairs, and on and under 

 the pericarp. Dr. Lopriore has showed that infected grains 

 reproduce the fungus, therefore it is most desirable to steep 

 infected grains most thoroughly, as wheat is steeped to prevent 

 the spread of smut, either in sulphate of copper solutions, which 

 have been proved over and over again to be fatal to the spores 

 of fungi, or with sulphuric acid solutions, as adopted by 

 Swedish barley growers. 



It may also be that infection is caused by the other forms of 

 the Sphceria herbarum. which are found upon beet, mangels, and 

 cruciferous plants. The leaves of these plants, when infected, 

 should therefore not be left on the ground, but be collected or 

 ploughed deeply in. Infected straw and chaff should be all passed 

 through well heated mixens. 



