Evaluation of Resistance to Septoria nodorum in Wheat. Rebeca C. Rufty, Former Graduate Student, Department of Crop Science, North Carolina State University, Raleigh 27650. T. T. Hebert, Professor, Department of Plant Pathology; and C. F. Murphy, Professor, Department of Crop Science, North Carolina State University, Raleigh 27650. Plant Dis. 65:406-409. Copyright 1981 American Phytopathological Society. DOI: 10.1094/PD-65-406.

A technique for screening wheat germ plasm for resistance to Septoria 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 two tests. Spreading infested straw in the field was an effective inoculation method, particularly in the spring.