Brimstone treatments gave the highest yield increase of 10 tonnes/ha.

Sulf-8 treatments did not give any yield increases compared with untreated

Elemantal S @ 500 Kg/ha was an incomplete data set.

Elemental S @ 1000 Kg/ha resulted in a yield depression compared with untreated

Brimstone treatments gave the highest commercially practical scab reduction.

Elemenal S @ 1000 Kg/ha gave a slight improvment in scab reduction but affected yield and cost £540 / ha.