Transmission of carrot, parsley, and parsnip yellows by Cicadula divisa
AuthorHenry H. P. Severin
Author AffiliationsHenry H. P. Severin was Associate Entomologist in the Experiment Station.
Hilgardia 7(3):163-179. DOI:10.3733/hilg.v07n03p163. November 1932.
Abstract does not appear. First page follows.
A number of plant pathologists have called attention to a disease of carrots having most of the characteristic symptoms of yellows, but whether it was caused by the aster-yellows virus remained to be determined.
In New York, Whetzel(8) reported a yellows disease of carrots ranging from a trace to 25 per cent infection in the Williamson area. Folsom(1) found apparently the same carrot disease as described by Whetzel, at Orono, Maine, and on the experimental farm in the southwestern part of the state. Zundel(9) reported observations of yellows believed to be caused by the aster-yellows virus in carrots in Cumberland County, Pennsylvania. Vaughan and Foster(7) found a disease of carrots in Wisconsin resembling aster yellows and assumed that it may be due to the same virus. The diseased carrots were growing adjacent to an experimental aster-yellows plot. Newhall(3) reported a disease of carrots thought to be due to the aster-yellows virus in Wayne and Oswego counties, New York.
 Folsom D. Yellows. The Plant Disease Reporter. 1929. 13:148-149. (Issued by the U. S. Dept. Agr. Bur. Plant Indus.)
 Kunkel L. O. Studies on aster yellows in some new host plants. Contrib. Boyce Thompson Inst. 1931. 3:85-123.
 Newhall A. G. Some special disease surveys in New York in 1929. The Plant Disease Reporter Suppl. 1930. 76:81-82. (Issued by the U. S. Dept. Agr. Bur. Plant Indus.)
 Severin H. H. P. Curly-top transmission experiments. Phytopath. 1924. 14:80-83.
 Severin H. H. P., Henderson C. F. Some host plants of curly top. Hilgardia. 1928. 3:339-392.
 Severin H. H. P. Carrot and parsley yellows transmitted by the six-spotted leafhopper, Cicadula sexnotata (Fall. Phytopath. 1930. 20: p. 920-921.
 Vaughan R. E., Foster A. C. Carrot. The Plant Disease Reporter Suppl. 1930. 75:56 (Issued by the U. S. Dept Agr. Bur. Plant Indus.)
 Whetzel H. H. Diseases of muck crops in New York. The Plant Disease Reporter. 1929. 13:174 (Issued by the U. S. Dept. Agr. Bur. Plant Indus.)
 Zundel G. L. Yellows (virus) on various plants. The Plant Disease Reporter. 1929. 13:174 (Issued by the U. S. Dept. Agr. Bur. Plant Indus.)