Date of this Version
Howe, W.L., Kehr, W.R. and Calkins, C.O. (1965) Appraisal for combined pea aphid and spotted alfalfa aphid resistance in alfalfa (Research Bulletin: Bulletin of the Agricultural Experiment Station of Nebraska No. 221)
Sources of combined resistance to spotted alfalfa and pea aphids were found in Ranger alfalfa and its parental strains, foreign plant introductions, clones and their progenies. Ranger alfalfa appeared to be a good source for selection of plants with resistance to both aphids.