The control of Septoria on celery seed

In studies on the control of Septoria on celery seed, ¼ and 1 lb (113 and 454 g) samples of infected seed treated by the thiram-soak method produced disease-free seedlings under glass and disease-free plants at maturity in the field. Hot-water treatment of infected seeds, however, failed to give complete disease control in either situation. Thiram soaking was not harmful to seed germination and produced field crops of equal quality to those obtained from hot-water-treated seeds. In N.A.A.S. extension trials a total of 18½ lb (8.3 kg) of celery seed was treated by the thiram-soak method and effective disease control was obtained in crops raised from this seed throughout the country.