SUMMARY
1. | A previously undescribed species of Papulospora, isolated from soil, is described. | ||||
2. | This species has been found to be parasitic on R. solani by both an internal and an external type of parasitism. | ||||
3. | The parasitism of the Papulospora on R. solani has been found, in pot tests, to be effective in reducing the amount of sugar beet black-root caused by R. solani. |