Abstract
THE possibility of raising varieties resistant to virus, bacteria, fungi, and insects is an attractive prospect for the practical plant breeder. Potatoes immune to wart disease, beans resistant to anthracnose, wheat resistant to rust, vines resistant to Phylloxera, and wheat, barley, and oats resistant to Hessian fly, eelworm, and frit fly are sufficiently well known to encourage the investigator to work on other crops. Several publications (Roemer, Isenbeck and Fuchs, Lesley and Wallace, Reddick, Painter, Jones, Johnston and Parker) have recently directed attention to different aspects of this question. The following short account is based on these publications. The accompanying table lists a few commercial crops which contain disease-resistant varieties.
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