ALFALFA DISEASES. 267 
states. This is not the true ‘troot rot.’’ It is not 
contagious; drainage will stop it, but once rotted the 
field had better be plowed, planted to other crops 
or resown. 
The Cotton Root Rot—This is a most serious 
proposition, fortunately not yet widespread. It is 
found to some extent in Texas, Mexico and some 
other cotton-growing states. When root rot attacks 
cotton the plants die in a circle, ever widening. If 
alfalfa is planted in a field infested with this disease 
the plants die in similar manner, all dying, usually, 
leaving a round spot of dead alfalfa. 
There is no known available remedy. If a field is 
badly infected with root rot it should be plowed and 
devoted to other crops for a time. It is not now 
known how long the land will remain infected. Land 
known to be infected with cotton root rot should not 
be sown to alfalfa. 
