Resistance to the Verticillium disease of strawberry occurs in a few varieties such as Sierra, Blakemore, and Marshall, in some breeding stocks, and in some forms of Fragaria chiloensis, one of the progenitors of the present-day large-fruited strawberry.

The above progress report is based on Research Project No. 981.

The U. C. soil mix was developed by K. F. Baker, Professor of Plant Pathology, University of California, Los Angeles, and his coworkers.