Subjects: Sociology Alerts Jobs Make a Gift Maps / Directions Text Only Accessibility The University of North Carolina at Charlotte 9201 University City Blvd, Charlotte, NC 28223-0001 | 704-687-8622 Â© UNC Charlotte | All Rights Reserved | Terms of Use | Policy Statements
Cause of Potato Scab. The cause of common potato scab is a bacterium, Streptomyces Scabies, found in the soil. It is most common on light, sandy soils, low in organic matter. Soils that were previously grassland are particularly liable to having the disease. Soils with a high pH (recently limed) provide a better environment for the bacteria.
1 The scab of potatoes is another case in point. 2  Pear scab is caused by a parasitic fungus, Fusicladium pyrinum, very closely allied and perhaps merely a form of the apple scab fungus, F. 3  Similar spraying is recom- (From a specimen in the British Museum.) mended for pear-leaf blister Pear Scab (Fusicladium pyrinum).