A bacteriophage in relation to Stewarts disease of corn
Phytopath 25(3): 371-372
A bacteriophage has been found associated with Aplanobacter stewartii. Isolations of the phage were made from dead corn plants, infected seed, and from infected plants which were recovering. Physiological changes were produced in the corn-wilt bacteria by the action of the phage, such as loss of yellow color, increase of viscosity of bacterial growth, and reduction or loss of virulence. Naturally infected seed treated with phage filtrate showed a marked reduction in disease when compared with untreated check plots. It is suggested that a bacteriophage may be an important biological factor in preventing more serious losses due to Stewart's disease.