Reference Report for Downy_ref4
| Title: | Physiologic races of the downy mildew fungus on soybeans in North Carolina |
| Authors: | Lehman, S.G. |
| Source: | Phytophath. 1958, 48(2):83-86 |
| Abstract: | Four new races of Peronospora manshurica (Nou.) Syd., obtained from collections of infected soybean seed harvested in North Carolina are described. The new races are designated 3A, 5, 5A, and 6. The reactions of 37 varieties of soybean to each of these new races are given. Race 3A is regarded as a subrace of race 3 previously described from a collection made in Tennessee. It differs from races 4, 5, and 5A by its ability to incite severe disease on C. N. S. and Ogden and from race 6 by its inability to infect Mukden and S-100. Races 5 and 5A differ from race 4, previously described from North Carolina, by their ability to incite severe disease on S-100 and light to moderate disease on Illini, Ogden, and Palmetto, varieties immune to race 4. They differ from race 6 by their inability to infect Mukden and Richland and their ability to cause disease on Acadian. Race 6 causes severe disease on niini, C. N. S., and Ogden which are immune to race 4. The soybean varieties Arksoy, Chief, Dorman, Dunfield, Otootan, Ralsoy, Rose Non Pop, Virginia Brown and P. I. 157-463A show no symptoms after inoculation with any of the newly recognized races, while Cherokee, Mammoth Yellow, Mamotan, Rokusun, Tar Heel Black, Tokio, Volstate and Jackson are moderately to highly susceptible to all of them. |
SoyBase
Follow us on Twitter @SoyBaseDatabase
