In this paper the writer recapitulates his arguments in favour of a reduction in the amounts of liquid disinfectants used in the control of fungous diseases of cereals. In recent experiments at Brunswick, 0.5 to 3 per cent. germisan, tillantin, and agfa, applied at the rate of 1.51. per cwt. of seed-grain, gave excellent control of wheat bunt, snow mould of rye, and stripe disease of barley ). The incidence of bunt in the untreated plots amounted to 79 per cent.