Establishment of disease-free citrus lines from infected lines may be possible by means of nucellar seedlings.

The above progress report is based upon Research Project No. 261. The experiments reported were initiated by H. B. Frost, of the Division of Plant Breeding, about 1918, and were carried on by him until recently. The studies with the Frost Eureka lemon are being made by Professor L. D. Batchelor, Director of the Citrus Experiment Station, Riverside.