Evaluation of Resistance toSeptoria nodorumin Wheat

Abstract

A technique for screening wheat germ plasm for resistance to S. nodorum was evaluated. Disease was evaluated in inoculated seedlings in a growth chamber and in mature plants in a 3 yr field study. The growth chamber technique was adequate for detecting differences in varietal reactions to glume blotch because determination of susceptibility at the seedling stage was highly correlated with ratings of adult plants in the field (R2 = 0.64, P < 0.01). A rank correlation of 0.86 was observed between the 2 tests. Spreading infested straw in the field was an effective inoculation method, particularly in the spring.