SUMMARY The effectiveness of organomercury seed treatments in controlling seedling disease caused by seed‐borne Fusarium nivale was studied in pot experiments. Ethyl mercuric chloride was more effective than phenyl mercuric acetate (PMA) on barley. Storing treated seed for 6 wk before sowing improved the performance of both compounds. PMA was less effective in controlling F. nivale than Septoria nodorum on wheat, although F. nivale was only slightly less sensitive to PMA in agar plate tests. Control of JF. nivale was usually more effective on wheat than on barley for the two seed samples used. PMA rates two to four times those applied commercially did not completely eliminate infection. Rates of PMA less than about 0–125μg Hg/seed did not significantly control F. nivale on wheat or barley.
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G. L. Bateman (1976) studied this question.