1919] DISEASES OF PLANTS. 643 



amount of winter wheat Is seeded In summer fallow, which receives a countless 

 Dumber of wind-borne spores. The maximum amount of seeding generally 

 follows Qm period of maximum spore fall, and during tins time both tempera- 

 ture and moisture conditions are specially favorable for smut. 



The production of an anthracnose-resistant White Marrow bean, W. H. 

 BuKKiiouni; (Phytopathology, 8 (1918), No. 7, pp. 358-859). — Following the dis- 

 covery of tin- resistance to anthracnose of the Bed Kidney bean (E. S. R.. 34, 

 p. 644), the author undertook the production of an anthracnose-resistant bean 

 by crossing the White Marrow with Wells Red Kidney bean. 



The hybrid plaids displayed a Tining character as early as the White Marrow, 

 but showed the pink coloration in the flower similar to the Bed Kidney. 

 Twenty-one plants were obtained winch yielded an average of 24.52 seeds to a 

 plant. These were grown and the observations on the Fi generation were 

 secured. The plaids were grown in pots and inoculated with spores from two 

 strains at CoUetOtrichum liitdcinufltianum, striking differences being observed 

 in the number of infections. The segregation of the different forms resulting 

 and their resistance are described. 



Further work was carried on which resulted in the establishment of a definite 

 resistant strain of the White Marrow beau, and in addition to this variety three 

 others that are considered less important commercially have been produced. 

 These are named the Vineless Marrow, the Ited Marrow, and the White Kidney. 

 A resistant strain of each has been obtained. 



Report of the botany division, H. W. Bakre (South Carolina Sta. Rpt. 1918, 

 pp. 21-2Jf). — According to the author, as a war measure, a large number of 

 samples of cotton seed were investigated to determine the presence of cotton 

 anthracnose, and in this way the planting of infected seed was prevented and 

 at the same time numerous lots of disease-free seed were located. In the course 

 of the Investigations on the cotton anthracnose, it was found that the disease 

 affects cotton quite differently in different sections of the South, and a coopera- 

 tive arrangement has been made which will Include the investigation of the 

 disease in Louisiana, Mississippi, and other Southern States. A number of 

 Strains of the organism have been isolated, and attempts are being made to 

 determine whether or not there is a difference in the virulence of the strains 

 collected from different parts of the country. 



In continuation of the investigation of the angular leaf spot of cotton 

 (EL S. B., 38, p. 47), it has been found that this disease can be controlled by 

 treating the seed with sulphuric add before planting. 



A preliminary note on a bacterial disease of foxtail, H. II. Rosen (Science, 

 n. scr., .}.'» (1!>19), No. 1264, P- 291). — The author reports having observed in the 

 vicinity of Fayetteville, Ark., a disease of foxtail which is characterized by 

 dark brown spots and streaks occurring on the leaves, flowering stalks, and 

 glumes. From infected material an organism has been isolated which both by 

 spraying and needle smearing has been successfully used to inoculate wheat, 

 oats, rye, barley, corn, Sudan grass, sorghum, and millet. Judging from the 

 appearance of infected plants in the greenhouse, the author believes that all of 

 the cereals mentioned, as well as various grasses, may be seriously attacked. It 

 Is considered probable that the organism is the same as that described by 

 Manns as I'srudomonas arena: (E. S. It., 22, p. 453). 



Pink root of onions, J. J. Taubenhaus (Science, n. ser., J f 9 (1919). No. 1261, 

 pp. 817, 818). — In a previous publication (E. S. R.. 37, p. 841) the author called 

 attention to a disease of onions characterised by pink roots. Subsequent in- 

 vestigations have shown that the disease is apparently due to an undescribed 

 organism for which the name Fusmium malli is proposed. 



