BARLEY YELLOW DWARF, an apid-transmitted virus disease of small grains, has caused serious losses in barley, wheat, and oats in California since its sudden widespread outbreak in 1952. Although it had not been recognized prior to that time, yellow dwarf is now known to be a major disease in most of the small-grain-producing areas of the world.

The following farm advisors cooperated in variety evaluation trials: W. E. Rendixen, D. M. Brandon, L. L. Bushmann, W. E. Cawelti, G. G. Gurtle, T. E. Kparney, S. W, Kite, W. E. Pendery, G. L. Ritenour, E. E. Stevenson.