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The beneficial results from spraying have, in many cases, been 
so great that, for a time, pathologists were inclined to think it a 
cure for all kinds of diseases. It is now clearly realized that, 
notwithstanding its great usefulness, it has its limitations, that 
there are many diseases it cannot reach and many others where 
it should not be relied on alone, but should be used in connection 
with other remedial measures. 
Soil treatment can be employed in comparatively few cases. 
vegetables in the Southern States. Sterilizing the soil in green- 
houses, by heating it with live steam from perforated pipes, is 
now saints with great success in preventing injury from 
nematodes and from various soil-inhabiting fungi. 
t importance of heredity as a factor in controlling 
ant diseases is o ow beginning to be fully recognized 
resist disease. Even in plants of the same cultural variety, this 
difference in resisting power is often quite marked. It has long 
been observed that some varieties are more resistant than others. 
It is now found that, like other qualities, this power of resistance 
is inheritable, and that by carefully breeding from the most 
resistant individuals, i is often possible to establish resistant 
resistant strains of cotton, described by Mr. Orton, of the Depart- 
ment of Agriculture, was particularly interesting. In a very few 
years he has been able to select strains of cotton, practically 
immune to the wilt, a disease that has devastated large areas in 
the Southern States. Spraying to prevent disease is at best an 
expensive and exacting operation, and cultivators will welcome 
the day, if it shall ever come, when the breeding and selection 
of resistant varieties shall make it no longer necessary. 
F. S. Earte. 
