Abstract
Very susceptible wheats (Triticum aestivum) were consistently susceptible but wheats with some resistance to Cephalosporium stripe (Cephalosporium gramineum) varied widely in disease reaction from season to season. In a highly susceptible wheat in a year favorable to the disease, as little as 430 kg/ha of infested straw produced maximum disease and an increase in disease was recorded with as little as 13-54 kg/ha of infested straw. Moderate resistance over a period of years is useful, especially when combined with rotation.