a the subject, that I have included what is generally plac 
964 On the Microscopic and General Characters of December, 
the bud and thus when placed in the new tree the fungus con- 
tinues to grow and the spores to germinate, and soon the tree 
succumbs to the disease. 
The transmitting of the spores or mycelia by the pruning 
knife, is still an obscure method of dissemination. There is no 
doubt, however, that the disease is carried in this way very often. 
Another and very important method of dissemination, is the 
transplanting of trees from diseased districts. Perhaps and prob- 
ably, the yellows is introduced into new localities as often in this 
way as in any other. We can not accuse any one of dishonesty 
in selling plants which are diseased, fer many do not know what 
the symptoms are, and still others honestly believe that it 1s 
nothing of importance. 
I have left what I consider the most important method until 
the last. It is the spreading of the disease by the germs OF 
spores being carried by the wind. It seems to me that the 
appearance of the yellows in isolated places and localities 1S 
strong evidence of this. Some may ask, why is not the disease 
more general if this is the case? I think that it can be affirme 
that the disease is already general. It has been reported from all 
the leading peach districts and new localities are found every 
season. Especially is its sudden appearance in orchards at @ 
short distance from infected districts to be taken into account. It 
is well known that no matter what the conditions of the atmos- 
phere may be, the spores of fungi are always floating about, 
wafted hither and thither, lighting upon various organic individ- 
uals, until the true host is found, and then remaining only to send 
into the tissues its filaments, forming its mycelia, and finally 
throwing off other spores to be transported in a like mannet i 
were those of their parent. If this trouble has its origin 1" pe 
fungoid growth, the spores are just as certain to be carried ie 
place to place by the wind as are those of any other species th 
grow upon other plants. 
‘ ; i : econ Ge 
It will be seen from the above discussion upon this division 
ed unde r 
a Pe ‘ : ne ‘tt isnot 
_ the head, “ Is this disease contagious?” Believing that it - oe 
a constitutional disease, but one due to a parasitical veget®™ = 
_ growth, I think that it is more proper to say that the — 
disseminated in this way or that, rather than to say that it! pat 
gious and may be caught by the healthy tree. oe 
