Sugar Beet Viruses

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    THE virus of sugar beet yellows has not hitherto been regarded as seed-borne. Phyllis E. M. Clinch and J. B. Lodgimane have shown, however (Sc. Proc. Dub. Soc. 24, No. 27 ; July 29, 1948), that seed of a new family of sugar beet (No. 41), when germinated, gives a considerable percentage of yellowed seedlings. The identity of this yellowing with sugar beet yellows is somewhat by implication ; but the symptoms and physiological effects are similar. The paper also describes two types of yellows disease from commercial sugar beet crops in Eire. Sugar beet yellows is probably the most serious disease of this crop in England. R. Hull and Marion Watson have a useful paper in the Journal of Agricultural Science (37, Part 4, 301-310 ; 1948) on the relation of nutrition and variety with severity of yellows. Manurial treatments in general increase the yields of roots and sugar ; but the losses caused by infection unfortunately increase proportionately as the mean yields increase. Fertilizers have little effect in varying the symptoms of the disease. Commercial varieties and some breeders' lines were tested for possible tolerance of the vitas ; but no useful indication of this was obtained.

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    Sugar Beet Viruses. Nature 163, 716 (1949) doi:10.1038/163716b0

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